White Lasagna with Asparagus, Spinach & Peas

This meatless lasagna was described as a showcase of spring vegetables. The filling was full of asparagus, peas, fresh herbs, greens, and leeks. It was loaded with cheese too, of course. 🙂

The recipe was adapted from The New York Times, contributed by Melissa Clark. I used no-boil noodles. I prepared it the day it was served but it could be prepared up to two days ahead. It can be assembled ahead of time and baked before serving or baked in advance and reheated before serving. Clark notes that the lasagna is easier to slice if it is baked and then reheated.

Yield: Serves 6 to 8

For the Béchamel:

• 4 T unsalted butter (plus additional butter or cooking spray for greasing the pan)
• 1/3 cup (5 T) all-purpose flour
• 4 cups whole milk, plus more if needed
• 1 teaspoon fine sea, plus more to taste
• 1/4 teaspoon freshly grated nutmeg
• 1 bay leaf
• 1/2 cup grated Parmigiano-Reggiano cheese
• 3 large garlic cloves, finely grated or minced (I used a garlic press)

For the Filling:

• 3 T extra-virgin olive oil
• 1 bunch asparagus (about 1 pound), ends trimmed, cut into 3/4-inch pieces if thin or 1/2-inch pieces if fat
• fine sea salt and freshly ground black pepper
• 1/2 cup frozen peas (no need to thaw)
• 1 cup combination of soft herbs (parsley, chives, basil, dill), finely chopped, plus more for garnish
• 2 leeks, white and light green parts, thinly sliced into half moons and cleaned
• 1 teaspoon fennel seeds
• 1/4 teaspoon red-pepper flakes
• 8 ounces baby spinach or baby greens, like kale or arugula (about 8 cups), chopped if large
• 1 large lemon, zested and juiced
• 32 ounces whole-milk ricotta (about 4 cups)
• 1 1/2 cups grated Parmigiano-Reggiano, divided
• 3/4 cup grated Pecorino Romano
• 12 ounces dried lasagna noodles (about 12 noodles), or substitute the same amount of no-boil, oven-ready or fresh noodles; all will work
• 8 ounces whole-milk mozzarella, thinly sliced or torn into pieces

To Prepare the Béchamel:

1. In a large saucepan, melt 4 tablespoons butter over medium heat.
2. Once melted, add flour and whisk until combined. Cook for 3 to 5 minutes, or until pale golden.
3. Slowly whisk in the milk, a little at a time, so that the sauce does not clump.
4. Add the salt, nutmeg and bay leaf. Gently bring to a simmer and let cook for 9 to 12 minutes, whisking often, until the béchamel is thick but still pourable.
5. Stir in 1/2 cup Parmesan and grated garlic, and taste, adding more salt if needed. (I used coarse salt.)

To Prepare the Filling & Complete the Dish:

1. Place a 12-inch skillet over medium to medium-high heat and add 1 tablespoon olive oil. Let it heat until it thins out, about 30 seconds, then add the asparagus and sauté, shaking the pan, until crisp-tender, 3 to 4 minutes.
2. Season asparagus with salt and pepper, then transfer to a medium bowl and stir in the frozen peas and 2 tablespoons mixed soft herbs.
3. Add remaining 2 tablespoons oil to the pan and heat until the oil thins out, about 30 seconds, then add the leeks, fennel seeds, red-pepper flakes and 3/4 teaspoon salt. Sauté leeks until tender and golden at the edges, 4 to 6 minutes.
4. Add the spinach and remaining herbs, working in batches if needed, and sauté until the greens are very tender and the pan is very dry, about 10 minutes.
5. Stir in lemon zest and juice. Taste and add more salt if needed. It should be well seasoned.
6. Add leek-spinach-herb mixture to a large bowl. Stir in ricotta and 3/4 cup each Parmesan and pecorino (save remaining Parmesan for the top). Taste and add more salt if needed.
7. Heat oven to 400 degrees. (I set my oven to true convection.) Grease a 9-by-13-inch baking pan with cooking spray or a little butter.
8. Remove bay leaf from béchamel, then ladle some of the sauce into the bottom of the baking pan until just covered.
9. Place as many noodles as will fit on top of the béchamel, breaking or cutting them to fit in one layer.
10. Ladle a little more béchamel on top of the noodles, covering the surface.
11. Add half of the ricotta-leek-spinach-herb mixture, spreading evenly, then sprinkle half of the asparagus-pea mixture on top.
12. Add another layer of noodles, then béchamel, then the remaining ricotta mixture, then the remaining asparagus-pea mixture.
13. Top with the sliced mozzarella.
14. Add a third and final layer of noodles (don’t worry if you don’t end up using all of the noodles) and cover with remaining béchamel.
15. Sprinkle with remaining 1/2 cup Parmesan.
16. Cover the pan with parchment paper and then foil; place on a parchment paper-lined rimmed baking sheet to catch any drips.
17. Bake for 30 minutes, then remove parchment and foil. Rotate the pan.
18. Bake for another 30 minutes on convection or up to 40 minutes in a standard oven, or until golden brown and bubbling on top. Rotate the pan for even browning, if necessary. (If the top is still pale, you can run the lasagna under the broiler for 1 to 3 minutes.)
19. Let sit for 20 to 30 minutes before serving.

Ottolenghi’s Butternut Squash Lasagna Pie

This special pie was the perfect way to use my CSA butternut squash and the very last leaves of my homegrown basil. The incorporation of cumin and coriander seeds gave it a unique flavor profile. Fancy comfort food. 🙂

The recipe was adapted from The New York Times, contributed by Yotam Ottolenghi. Lovely.

Yield: 6 to 8 servings

For the Pie:

• 4 T olive oil, plus more for greasing the pan (I used cooking oil spray on the pan)
• 10 garlic cloves, roughly chopped
• 2 T tomato paste
• 1 T cumin seeds, roughly crushed in a mortar and pestle
• 1 T coriander seeds, roughly crushed in a mortar and pestle
• 2 tsp Aleppo chile flakes
• 1 (9 to 12-ounce) jar red peppers, drained
• 1 tsp light brown sugar
• fine sea salt and freshly ground black pepper
• 1 small butternut squash (about 1 3/4 pounds), peeled, halved, deseeded and cut into 1/8-inch-thick slices (I used a mandoline to slice the squash)
• 8 ounces dried lasagna noodles, each roughly broken into 3 or 4 pieces (I used oven-ready no-boil lasagna)
• 7 ounces baby spinach (10 lightly packed cups)
• 1 packed cup basil leaves, torn in halves
• 1 cup crumbled Greek feta
• heaping 1/2 cup finely grated Parmigiano-Reggiano

For the Béchamel:

• 3 T unsalted butter
• 5 T all-purpose flour
• 1 1/2 cups whole milk, plus more if needed
• 2 garlic cloves, minced
• fine sea salt
• 1/4 cup finely grated Parmigiano-Reggiano

1. Heat the oven to 400 degrees, preferably on convection.
2. Grease a 9-inch springform cake pan then line it with a piece of parchment paper large enough to cover the base and hang over the sides by a couple inches. (I used cooking oil spray.) Place pan on a parchment paper-lined rimmed baking sheet and set aside.
3. Add the oil to a small frying pan and heat over medium. Once it’s hot, add the garlic and cook for about 30 seconds to 1 minute, stirring until fragrant but not browned.
4. Add the tomato paste, cumin, coriander and chile flakes and cook for 1 minute more, stirring often, until deeply red. Set aside to cool slightly.
5. Add tomato paste mixture to a small food processor with the red peppers, sugar, 1/2 teaspoon salt and a good grind of pepper; blitz until smooth. (I did this in 2 batches.)
6. Empty the mixture into a very large bowl and add the squash slices, lasagna pieces, spinach, basil, feta, Parmesan, 1 1/4 teaspoons salt and a good grind of pepper. Use your hands to make sure everything is nicely coated.
7. Transfer this mixture to your lined cake pan, adding a third at a time and pressing lightly to ensure everything is even and compact.
8. Using heavy-duty aluminum foil, wrap the cake pan all around until tightly sealed, place on the prepared baking sheet and bake for 1 hour.
9. Toward the last 15 minutes of baking time, make the béchamel: Melt the butter in a medium saucepan over medium heat. Whisk in the flour and cook, whisking steadily, for 2 to 3 minutes, or until it starts to smell like popcorn.
10. Slowly pour in the milk 1/2 cup at a time, whisking with each addition until fully incorporated.
11. Add the garlic and 1/4 teaspoon salt. Use a spatula to stir and cook for 2 minutes, stirring to ensure the bottom doesn’t scorch, until nice and smooth.
12. Off the heat, stir in the Parmesan. *If the pie isn’t done, cover the top with a piece of parchment paper to prevent a skin from forming. The béchamel is easier to handle when warm; if needed, reheat gently with a splash of milk to loosen.*
13. After the pie has cooked for 1 hour, remove it from the oven and carefully unwrap the top foil and paper, crinkling it down and around the sides of the pan to expose the top.
14. Spoon the béchamel on top, using a spatula to distribute it evenly over the surface. (Take care not to mix it with the base; you want the béchamel to remain white.)
15. Turn the oven temperature up to 450 degrees, preferably on convection, and place the cake pan back on its baking sheet and bake for another 10 to 20 minutes, rotating halfway through, until nicely browned on top.
16. Set aside to cool for at least 15 minutes.
17. Carefully release the pie from the springform pan, loosening the outer ring then using the parchment to help lift it onto a serving plate or board. Serve warm or at room temperature.

Stovetop Meatball Lasagna

This is a crowd-pleasing, lighter, stovetop upgrade to a classic lasagna. It was also less time consuming to prepare. I loved the brightness from the incorporation of fresh herbs.

The recipe was adapted from Bon Appétit, contributed by Shilpa Uskokovic. I modified the method and added garlic. The grated zucchini and panko in the meatballs made them very tender. Fabulous!

Yield: Serves 4 to 6 (5 in my house)

• 1 large zucchini (about 12 oz), finely grated (about 1½ cups)(I used a food processor)
• 1 1/2 cups panko
• 1 tsp dried oregano
• 1 tsp garlic powder
• 1 tsp paprika
• 6 T extra-virgin olive oil, divided
• 2 tsp Diamond Crystal or 1 1/4 tsp Morton kosher salt, plus more, to taste
• 1 lb ground chicken
• 1/2 cup finely chopped dill, plus more for serving
• 1/2 cup finely chopped parsley
• 1 28 oz can whole, peeled tomatoes (I used San Marzano)
• 2 large garlic cloves, thinly sliced
• 1 large shallot, thinly sliced
• 8 oz fresh whole milk ricotta
• finely grated lemon zest from 1/2 a large lemon
• 10 oz lasagna noodles, broken into 2–3 pieces (do not use oven-ready noodles)(I used DeCecco)
• grated Parmesan, for serving (I used Parmigiano-Reggiano)

1. Using a sturdy wooden spoon or rubber spatula, vigorously stir grated zucchini, panko, oregano, garlic powder, paprika, 1 tablespoon extra-virgin olive oil, and kosher salt in a large bowl until combined and nearly paste-like. (I grated the zucchini medium-large because I used a food processor.)
2. Add ground chicken, chopped dill and parsley and mix until fully incorporated (you don’t need to worry about overmixing here; mixture will be soft). (I used a food processor to finely chop the fresh herbs.)
3. Heat 1 tablespoon extra-virgin olive oil in a large Dutch oven or other heavy pot over medium to medium-high. (I used a large enameled cast iron Dutch oven.)
4. Using a 3 tablespoon cookie scoop, portion out half of meat mixture (meatballs don’t need to be perfectly round; rustic-looking is good) and add directly to pot. (I did 2 batches of 8 meatballs.)
5. Cook, undisturbed, until well browned underneath, about 2 to 3 minutes.
6. Carefully turn meatballs over and cook until second side is golden brown, about 2 to 3 minutes (it’s okay if meatballs still look misshapen).
7. Using a slotted spoon, transfer to a large plate.
8. Pour an additional 1 tablespoon of extra-virgin olive oil into pot and repeat process with remaining meat mixture. (the remaining 8 meatballs)
9. Return all meatballs to pot, the add canned tomatoes with juice, lightly crushing with your hands as you go, sliced garlic and shallot, and remaining 3 tablespoons extra-virgin olive oil; season with salt.
10. Reduce heat to medium-low, cover pot, and cook meatballs and sauce, gently stirring occasionally (it’s okay if meatballs start to fall apart), until sauce is slightly thickened, 15–20 minutes. (After stirring halfway through the cooking time, I reduced the heat to low.)
11. Meanwhile, whisk together ricotta, grated lemon zest, and a large pinch of salt in small bowl until smooth; set aside.
12. Cook broken lasagna noodles in large pot of boiling salted water, stirring occasionally, until just shy of al dente, about 3 minutes.
13. Using tongs, drop noodles into pot with sauce and cook, stirring gently, until sauce coats pasta.
14. Divide pasta among shallow bowls and spoon dollops of reserved lemony ricotta over each.
15. Top with dill and grated Parmesan, as desired. 

Do ahead: Meatballs and sauce can be made 3 days ahead; let cool. Transfer to an airtight container; cover and chill. Lemony ricotta can be made 1 day ahead. Cover and chill.

Cheesy & Crunchy Baked Pasta with Cauliflower

I loved that this cheesy comfort food baked pasta dish incorporated an entire head of cauliflower. The lemon zest and capers also added brightness which had a nice balance with the cheese.

The recipe was adapted from Food and Wine, contributed by Ina Garten. Great comfort food.

Yield: Serves 8

• Kosher salt
• freshly ground black pepper
• 1 pound dried pasta, such as medium shells (I used Cascatelli)
• extra virgin olive oil
• 2 1/2 pounds cauliflower (1 large head cut into small florets) 
• 3 tablespoons sage leaves, roughly chopped
• 2 tablespoons capers, drained
• 15 cloves garlic, minced
• 1/2 teaspoon grated lemon zest
• 1/4 teaspoon crushed red pepper flakes
• 2 cups Fontina cheese, lightly packed (10 oz with rind)
• 1 cup (8 oz) whole milk ricotta
• 1/2 cup panko
• 6 tablespoons freshly grated Pecorino-Romano cheese
• 2 tablespoons parsley leaves, minced fresh

1. Preheat the oven to 400°. (I set my oven to convection.)
2. Fill a large pot with water, add 2 tablespoons of salt and bring to a boil. Add the pasta and cook until 2 minutes less than al dente, according to the instructions on the package. (Since it will be baked later, don’t overcook it! Drain and pour into a very large bowl.)
3. Meanwhile, heat 3 tablespoons of olive oil in a large (12 to 14-inch) skillet or sauté pan over medium-high heat, add half of the cauliflower in one layer and sauté for 5 to 6 minutes, tossing occasionally, until the florets are lightly browned and tender. Season with salt.
4. Pour the cauliflower, including the small bits, into the bowl with the pasta.
5. Add 3 more tablespoons of olive oil to the sauté pan, add the remaining cauliflower, cook until browned and tender and add to the bowl.
6. Add the sage, capers, garlic, lemon zest, red pepper flakes, 1 1/2 teaspoons salt and 1 teaspoon black pepper to the bowl and stir carefully.
7. Stir in the Fontina.
8. Transfer half of the mixture to a 10 x 13 x 2–inch rectangular baking dish.
9. Spoon 12 rounded tablespoons of ricotta on the pasta and spoon the remaining pasta mixture on top. (I used a cookie scoop.)
10. Combine the panko, grated Pecorino, minced parsley and 1 tablespoon of olive oil in a small bowl and sprinkle it evenly on top.
11. Bake for 22 minutes on convection, or 25 to 30 minutes in a standard oven, until browned and crusty on top. Serve hot.

Note: The dish can be assembled ahead of time. Assemble the dish, cover and refrigerate overnight. Bake before serving.

Cheesy Baked Pasta with Butternut Squash & Greens

My kids love the Butternut Squash Mac and Cheese from Trader Joe’s. (It sells out daily- so they are clearly not alone!) This vegetarian comfort food dish seemed reminiscent enough to be a crowd-pleaser. 😉 I liked that it incorporated leafy greens too.

This recipe was adapted from The New York Times, contributed by Yasmin Fahr. I modified the method and proportions. I also added a poblano chile, red onion, garlic, and cilantro. Nice.

Yield: Serves 6

• Kosher salt
• 3 tablespoons olive oil
• 1 medium or 1/2 large red onion, diced
• 1 poblano chile, seeded, ribbed, and diced, divided (or 1 jalapeño, sliced into rounds)
• 6 large garlic cloves, thinly sliced
• 1 medium butternut squash (about 2 1/2 pounds), peeled, seeds removed and cut into 1/2-inch cubes (about 6 cups)
• 1 tablespoon ground cumin
• 1/2 teaspoon red-pepper flakes, plus more to taste
• 1 pound rigatoni, penne, or other tubular pasta
• 3/4 cup freshly grated Parmesan (I used Parmigiano-Reggiano), divided
• 4 packed cups greens (I used 2 cups turnip greens (sliced into 1-inch ribbons) and 2 cups baby spinach)
• 8 oz (1/2 pound) fresh mozzarella, torn into bite-size chunks
• 1/3 cup cilantro or flat-leaf parsley and tender stems, roughly chopped, for garnish

1. Bring a large covered pot of heavily salted water to a boil. Cook the pasta until not quite al dente, 3 to 4 minutes less than the package instructions. (It should be a little too firm to the bite.) Reserve 2 cups of the pasta water and drain. Set aside.
2. Meanwhile, in a 12-inch ovenproof skillet with high sides and a tight-fitting lid (or a Dutch oven), heat the oil over medium-high until shimmering. (I used a large and wide enameled cast iron pan.)
3. Add the diced onion and half of the diced poblano chile, season with salt, and cook until beginning to soften, about 2 minutes.
4. Add the sliced garlic and continue to cook until fragrant, about 30 seconds.
5. Add the cubed squash and season with salt, cumin, and red-pepper flakes. Cook, stirring every minute, until squash becomes browned in spots and feels just tender, 6 to 8 minutes.
6. Meanwhile, heat the oven to 400 degrees. (I set my oven to convection.)
7. When the squash is just tender, add 1 cup of the reserved pasta water. Bring to an active simmer, cover and cook, stirring occasionally, until the squash is soft and easily mashable, 10 to 12 minutes.
8. Turn off the heat, then use the back of a wooden spoon to crush about half of the butternut squash and leave the rest chunky. Season the squash to taste, keeping in mind that salty Parmesan will be added soon.
9. Add the cooked pasta to the skillet along with the remaining 1 cup of reserved pasta water and 1/2 cup grated Parmesan. Stir vigorously to combine.
10. Stir in the greens one handful at a time until each addition wilts slightly.
11. Sprinkle the top with the remaining 1/4 cup Parmesan, the mozzarella, and the remaining diced poblano chile. Place in the oven and cook until the top is melted and browned in spots, 12 to 15 minutes.
12. Top with minced cilantro and serve.

Spinach Manicotti

I have shared my love for manicotti in the past– stemming from wonderful memories of enjoying it with my college roommate’s large Italian family on Easter Sunday.

I have made many versions of spinach manicotti, usually filling store-bought manicotti noodles. Using no-boil lasagna noodles instead was a great “less-hassle” shortcut. They were also chosen to mimic the texture of fresh pasta. It was absolutely true! I will never buy manicotti noodles again. 😉

This recipe was adapted from America’s Test Kitchen. I replaced one cup of ricotta cheese with an equivalent amount of chopped, steamed spinach seasoned with freshly grated nutmeg. I also used whole milk ricotta instead of part-skim, part-skim mozzarella instead of whole milk mozzarella, coarse salt instead of table salt, and modified the method. Fabulous.

Yield: Serves 6 to 8

For the Tomato Sauce:

• 2 28-ounce cans diced tomatoes with juice
• 2 tablespoons extra-virgin olive oil
• 3 to 6 cloves garlic, minced
• 1/2 teaspoon hot red pepper flakes, optional
• coarse salt
• 2 tablespoons chopped fresh basil

For the Filling & Pasta:

• 6 oz baby spinach
• 1/4 teaspoon freshly grated nutmeg, or to taste
• 2 cups whole milk ricotta cheese (can substitute part-skim ricotta)
• 4 ounces (about 2 cups) grated Parmesan cheese, divided (I used Parmigiano-Reggiano)
• 8 ounces (about 2 cups) shredded mozzarella cheese (I used part-skim mozzarella)
• 2 large eggs, lightly beaten
• 3/4 teaspoon coarse salt
• 1/2 teaspoon freshly ground black pepper
• 2 tablespoons chopped fresh parsley leaves
• 2 tablespoons chopped fresh basil
• 16 no-boil lasagna noodles (I used Trader Joe’s)

1. Steam the baby spinach until wilted. (I did this on the stove top.)
2. Let the spinach cool slightly, then use a potato ricer to remove excess liquid. Coarsely chop. (You should have about 1 cup.) Season with salt and freshly ground nutmeg. Set aside.
3. Adjust oven rack to middle position and heat oven to 375 degrees, preferably on convection.
4. Make the Sauce: Pulse 1 can tomatoes with their juice in food processor until coarsely chopped, 3 or 4 pulses. Transfer to a bowl. Repeat with remaining can tomatoes.
5. Heat oil, garlic, and pepper flakes (if using) in large saucepan over medium heat until fragrant but not brown, 1 to 2 minutes.
6. Stir in tomatoes and 1/2 teaspoon salt and simmer until thickened slightly, about 15 minutes.
7. Stir in basil; adjust seasoning with salt. Set aside.
8. Make the Filling: Combine the chopped spinach, ricotta, 1 cup Parmesan, mozzarella, eggs, salt, pepper, and herbs in medium bowl; set aside.
9. To Assemble: Pour 1 inch boiling water into 13 by 9-inch broiler-safe baking dish, then add noodles one at a time. (I used a pyrex dish.) Let noodles soak until pliable, about 5 to 6 minutes, separating noodles with tip of sharp knife to prevent sticking.
10. Remove noodles from water and place in single layer on clean kitchen towels. Do not use paper towels because the noodles may stick. (I used flour sack towels.)
11. If using the same dish to bake the manicotti, drain the water and dry the dish. (I used a ceramic baking dish to bake the manicotti instead of using the pyrex dish.)
12. Place the preferred baking dish on a rimmed baking sheet. Spread bottom of baking dish evenly with 1 1/2 cups sauce.
13. Using a large cookie scoop or a soup spoon, spread 3 to 4 tablespoons of the spinach-cheese filling mixture evenly onto bottom three-quarters of each noodle (with short side facing you), leaving top quarter of noodle exposed.
14. Roll into tube shape and arrange in baking dish seam side down.
15. Top evenly with remaining sauce, making certain that pasta is completely covered. (It seems like a lot of liquid but it’s necessary for the no-boil noodles to cook properly.)
16. To Bake: Cover manicotti with aluminum foil. Bake until bubbling, about 40 minutes, then remove foil.
17. Remove baking dish, adjust oven rack to uppermost position (about 6 inches from heating element).
18. Sprinkle manicotti evenly with remaining 1 cup Parmesan. Return to the oven on the adjusted oven rack; bake for 5 to 6 minutes, or until the cheese is melted and the sauce is bubbling.
19. Set the oven to broil.
20. Broil until cheese is lightly brown or spotty brown, 1 to 2 minutes. Cool 15 minutes, then serve.

Note: The manicotti can be prepared through step 15, covered with a sheet of parchment paper, wrapped in aluminum foil, and refrigerated for up to 3 days or frozen for up to 1 month. (If frozen, thaw the manicotti in the refrigerator for 1 to 2 days.) To bake, remove the parchment, replace the aluminum foil, and increase baking time to 1 to 1 1/4 hours.

Stovetop Mushroom Lasagna

This easy and creamy vegetarian stovetop lasagna was very well received by my family. 😉 The original recipe said that it wasn’t as pretty as a typical baked and layered lasagna, but I thought that it looked pretty appealing.

The recipe was adapted from Bon Appétit, contributed by Sarah Jampel. I increased the amount of mushrooms and garlic. I also used no-boil lasagna noodles. It is a perfect weeknight dish.

Yield: Serves 4 to 6

• 5 T extra-virgin olive oil, divided
• 12 to 16 oz mixed mushrooms (such as maitake, oyster, shiitake, and/or crimini), trimmed, cut or torn into 1″ pieces (I used stemmed & quartered cremini mushrooms)
• 1 1/2 tsp kosher salt, plus more to taste
• 2 T thyme leaves
• 1 large shallot, finely chopped
• 3 to 6 garlic cloves, finely grated or chopped
• 2 T all-purpose flour
• 2 3/4 cups whole milk
• freshly ground black pepper
• lemon zest, plus wedges for serving, optional
• 1/3 cup crème fraîche or thinned sour cream
• 8 to 9 oz regular lasagna noodles, broken in half (no-boil okay)
• 4 to 5 oz mozzarella, thinly sliced
• finely grated Parmesan, for serving

1. Heat 3 tablespoons of oil in a large high-sided ovenproof skillet (preferably with a lid) or small Dutch oven over medium-high. (I used a large, wide enameled cast iron pot.)
2. Add mushrooms and cook, undisturbed, until starting to brown, about 4 minutes. Season with salt and cook, tossing occasionally, until golden brown, 5–7 minutes. Transfer to a bowl; mix in thyme.
3. Meanwhile, finely chop the shallot and garlic cloves in the bowl of a mini food processor.
4. Reduce heat to medium-low. Heat remaining 2 tablespoons of oil in the pan. Add shallot and garlic and cook, stirring, until starting to soften, about 1 minute.
5. Sprinkle flour over and cook, stirring, until golden, about 1 minute.
6. Add milk, pepper, 1 1/2 teaspoons salt, and 1 3/4 cups water, then finely grate zest of 1/4 lemon into pan. Stir to dissolve flour, increase heat to medium, and cook until gently bubbling.
7. Reduce heat to low, whisk in crème fraîche (or sour cream), and stir to combine.
8. Add about one third of noodles, pushing down into sauce to submerge, followed by a third of the mushrooms.
9. Repeat with half of remaining noodles and mushrooms.
10. Top with another layer of noodles. **Set remaining mushrooms aside.**
11. Cover with a lid or foil and cook 15 minutes. (If lasagna threatens to boil over, use very lowest heat and/or prop open the cover.)
12. Uncover; cook, gently lifting and separating noodles occasionally with tongs or a spatula to let sauce flow around, until sauce is thickened and noodles are cooked through, 6–10 minutes. Mixture should be bubbling gently; adjust heat as necessary. Remove from heat.
13. Heat broiler. Top lasagna with mozzarella and reserved mushrooms.
14. Broil until cheese is bubbling and browned in spots, about 2 minutes.
15. Finely grate more lemon zest over. Sprinkle with Parmesan; season with pepper.
16. Let sit 5–10 minutes. Cut lemon into wedges, if desired, and serve with lasagna.