Heat oil in a large skillet over medium-high heat. Add onion, bell peppers, mushrooms, and garlic, and cook, stirring often, until vegetables are tender, about 5 minutes.
Add black beans, cumin, chili powder, oregano, salt, and pepper. Cook, stirring often, until vegetables are tender, about 5 minutes.
Transfer vegetable mixture to a bowl and allow to cool slightly.
Preheat oven to 375 degrees F (190 degrees C).
Lay a tortilla on a work surface. Spread 1/4 of the vegetable mixture over the tortilla. Sprinkle with 1/4 of the cheese. Fold in the sides and then roll up the tortilla.
Repeat with the remaining tortillas, vegetable mixture, and cheese.
Place the burritos on a baking sheet. Bake in preheated oven until cheese is melted and tortillas are lightly browned, about 10 minutes.
Serve with salsa.
Interesting Facts
Burritos are a traditional Mexican dish made of a flour tortilla filled with a variety of ingredients.
Burritos can be filled with a variety of meats, beans, and vegetables.
The word ‘burrito’ comes from the Spanish word for ‘little donkey’.