I must confess that we’ve eaten these delicious sandwiches on a couple of occasions already. They are a fabulous variation of the more common vegetarian alternative “parm” sandwich, eggplant parmesan. Worth using the oven in the summer! 🙂
This recipe was adapted from Meatless Sheet Pan Suppers: 100 Surprising Vegetarian Meals Straight from the Oven by Raquel Pelzel. I served them with both challah and potato rolls, on different occasions. The original recipe recommends sub rolls. I modified the proportions, used part-skim mozzarella, and substituted fontina for the provolone cheese. Fabulous!
Yield: 4 sandwiches
- 8 T extra-virgin olive oil
- 6 garlic cloves, finely grated
- 1/2 cup panko bread crumbs
- 1 tsp plus a pinch of kosher salt
- 3/4 cup grated low-moisture part-skim mozzarella cheese
- 3/4 cup grated fontina or provolone cheese
- 6 T finely grated Parmigiano Reggiano cheese
- 4 large or 6 medium portobello mushrooms, stemmed and sliced 1/4 inch thick
- 1/2 cup store-bought or homemade marinara sauce (I used Trader Joe’s Marinara Sauce with Barolo Wine), or more, as desired
- 4 rolls, such as challah, potato, or sub rolls
- Adjust an oven rack to the middle position and preheat the oven to 400 degrees, preferably on convection roast.
- Combine the olive oil and garlic in a microwave safe bowl, and warm in the microwave at high power until the garlic is fragrant, about 30 to 45 seconds.
- Pour 3 T garlic oil into a small bowl and add the panko bread crumbs and a pinch of kosher salt. Rub together with your fingers to combine and set aside, reserving the remaining garlic oil. (Add up to an additional tablespoon of garlic oil, as needed.)
- In a separate bowl, combine the mozzarella, fontina (or provolone), and Parmigiano Reggiano cheeses.
- Place the mushrooms in a medium-sized bowl and toss with 2 T garlic oil and the remaining 1 tsp kosher salt.
- Transfer the mushrooms to a parchment paper-lined, rimmed sheet pan and roast until tender, 10 to 12 minutes. Do not flip them. Transfer the mushrooms to a plate and set aside.
- Line a second sheet pan with aluminum foil (or the same pan if it is cool enough to handle). Adjust the oven rack to the upper-middle position and preheat the broiler to high.
- Open the rolls and lightly brush the interior of each with some of the remaining garlic oil.
- Place the rolls, face up, on the prepared sheet pan and broil until the bread is golden brown, 1 to 2 minutes. Watch carefully! Remove the rolls from the oven, keeping the broiler on, and divide the tops of the rolls among 4 plates. Leave the bottom of the rolls on the sheet pan.
- Arrange the mushrooms over the bottom halves of the rolls and top each with 2 (or more) T marinara, spreading it out a bit.
- Divide the cheese over each mound of vegetables and return the sheet pan to the broiler. Broil until the cheese is melted, 1 to 3 minutes, watching carefully.
- Sprinkle the reserved panko bread crumbs evenly over the cheese and return to the broiler until the crumbs are golden and crisp, 1 to 2 minutes.
- Transfer each portion to a plate and top with reserved roll top. Serve hot.