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1
For the Sauce: Heat a large skillet over medium-high heat.
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2
Add the dried chiles and press down on them with a spatula, turning as needed until the color changes slightly, 3 to 5 minutes.
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3
Place the chiles in a heatproof bowl with enough boiling water to cover.
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4
Set aside for 30 minutes to rehydrate.
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5
Heat the oil in a small skillet over medium heat.
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6
Add the onion and garlic and cook for 3 minutes, then transfer to a blender or food processor.
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7
Drain the chiles and add them to the blender, along with the remaining sauce ingredients.
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8
Process until smooth.
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9
Taste and adjust the seasonings.
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10
Set aside.
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11
For the Burritos: Heat the oil in a large skillet over medium heat.
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12
Add the onion and cook until it begins to turn translucent, about 5 minutes.
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13
Add the poblano and cook 3 minutes.
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14
Add the mushrooms and garlic.
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15
Cook 3 to 5 minutes, until the mushrooms begin to soften.
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16
Add the beans, cumin, chili powder, oregano, red pepper flakes, tomato paste, lime juice, and nutritional yeast.
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17
Stir together, then add the spinach.
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18
Cook, stirring occasionally, about 5 minutes.
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19
Add a splash of broth or water if the mixture is too dry.
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20
Season with salt and pepper to taste.
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21
Preheat the oven to 400F.
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22
Lightly spray or oil a 9 x 13-inch baking pan.
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23
Fill each tortilla with 1/8 of the filling.
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24
Roll up and arrange in the baking pan.
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25
Repeat until all the burritos are filled.
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26
Pour the reserved sauce over the burritos and bake 15 to 20 minutes, until bubbly.
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27
Serve hot with toppings as desired.