Mushroom Tacos with Avocado-Tomatillo Sauce

More tacos to share! I served these full-flavored vegetarian tacos for our Cinco de Mayo celebration this year- with margaritas, chips, and guacamole, of course.

The recipe was adapted from The Essential Mexican Instant Pot Cookbook: Authentic Flavors and Modern Recipes for your Electric Pressure Cooker by Deborah Schneider. I used a stove top pressure cooker instead of an instant pot, but this filling could be prepared just as easily without using a pressure cooker at all. The creamy avocado sauce was amazing!

The original recipe is for “quesotacos” which the author describes as black-belt street cooking, made by browning a layer of cheese right on a griddle, scooping it up with a tortilla, and using that to wrap the filling. I opted to serve the filling over the shredded cheese in a traditional taco form. This wonderful filling is also used in enchiladas in this book. Yum!

Yield: Serves 4 to 6, with about 1 cup of Avocado-Tomatillo sauce

For the Avocado-Tomatillo Sauce:

  • 1 ripe avocado, halved, pitted, and peeled
  • 2 tomatillos, husked and roughly chopped
  • 1/4 cup diced white onion
  • 1/2 serrano chile, stemmed (and seeded, if desired)
  • 1 T water
  • 1/2 tsp kosher salt
  • leaves from 2 sprigs cilantro, chopped (about 1 T)

For the Mushroom Tacos:

  • 3 T olive oil
  • 1 large white onion, cut into 1-inch dice (2 cups) (I reserved 1/4 cup of the onion for the sauce)
  • 9 garlic cloves, minced (3 T)
  • 1/2 cup water
  • 2 tsp kosher salt
  • 2 large portobello mushrooms, cut into 1-inch pieces
  • 8 to 10 oz cremini mushroom, sliced or cut into quarters
  • 8 to 10 oz white button mushrooms, sliced or cut into quarters
  • 1/4 cup chopped fresh cilantro leaves or shredded fresh epazote
  • 1/2 tsp freshly ground black pepper
  • 1/8 tsp red pepper flakes
  • 2 poblano chiles, roasted, seeded, peeled, and cut into 1/2-inch pieces
  • 12 corn or corn-wheat tortillas
  • 1 1/4 cups shredded Monterey Jack cheese
  • 3/4 cup crumbled feta cheese or grated Cojita cheese
  • Avocado-Tomatillo sauce, for serving
  • chopped fresh cilantro, for serving

To Make the Sauce:

  1. In a food processor, combine the avocado, tomatillos, onion, Serrano Chile, water, and salt.
  2. Pulse until fairly smooth, about 10 pulses, scraping down the bowl as needed.
  3. Add the cilantro and pulse a couple of times to combine.
  4. Transfer to a bowl, then taste and adjust seasoning with salt if needed.

Note: The Sauce will keep well for 24 hours, covered and refrigerated.

To Make the Filling:

  1. Place poblano chiles on a foil-lined baking sheet.
  2. Broil the poblano chiles in the oven, rotating every 5 to 7 minutes, until charred and blistered on all sides. (I set my oven to Broil Max at 450F.)
  3. Wrap the chiles in the foil lining, to loosen the charred skin with steam.
  4. When cool enough to handle, peel, seed and dice the roasted chiles.
  5. Heat the oil in a pressure cooker, instant pot, or dutch oven.
  6. Sauté the onions, stirring occasionally, for about 5 minutes, until golden brown.
  7. Add the garlic and cook, stirring, for about 1 minute.
  8. Add the water, salt, portobello mushrooms, cremini mushrooms, and white mushrooms, then stir in the cilantro/epazote.
  9. If using a pressure cooker or instant pot, secure the lip and cook on high for 1 minute. (Alternatively, cook the mixture in a Dutch oven until mushrooms have released a significant amount of moisture and are lightly browned.)
  10. Use the quick pressure release. (I rotate the valve into a perpendicular position on the top of my pressure cooker.)
  11. Set a colander in a bowl. Pour the mushroom mixture into the colander, reserving the liquid in the bowl.
  12. Set the colander aside and return the liquid to the pot.
  13. Bring the liquid to a boil, and cook for 10 to 15 minutes, until syrupy and very thick.
  14. Return the mushroom mixture to the pot and stir in the black pepper, pepper flakes, and roasted and diced poblano chiles.
  15. Cook, stirring occasionally, for about 3 minutes, until heated through.
  16. Taste and adjust seasoning with salt and pepper, as desired.
  17. Serve the mushroom filling in warm tortillas over shredded Monterey Jack and crumbled feta. Top with sauce, minced cilantro, and extra cheese, as desired.

For “Quesotacos”:  Heat a cast iron skillet over medium-high heat. Lightly oil, place a tortilla in the pan and toast for about 3 minutes, until golden brown. Turn the tortilla and top with 2 T of Jack cheese and 1 T of feta/Cojita. Continue toasting until cheese is melted, about 3 minutes more. Top with mushroom mixture, sauce, sprinkle of cheese, and pinch of cilantro. Serve immediately.

For a Grilled Corn & Mushroom Variation: Add kernels from 2 ears of grilled corn to the pot after adding the roasted poblano chiles.

About Josette@thebrookcook

I live in Stony Brook, New York on Long Island. I love garlic and baking. My hobby (and love) is to try new recipes. My favorite recipe resources include The New York Times, Food and Wine, Bon Appetit, and Martha Stewart Living. Enjoy!

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