Heat oven to 350°F.
Heat 1 Tbsp oil in frying pan on medium heat. Add onion, mushroom and green pepper. Cook 2-4 minutes or until tender.
Add tomatoes and spices and cook for 2 more minutes
Add beans. Stir to combine.
Tear tortillas into bite-size pieces.
Layer 1/2 tortillas, 1/2 filling and 1/2 cheese in 8-inch baking pan that has been coated with 1 Tbsp of olive oil. Repeat layers, ending with cheese.
Bake uncovered for 20 minutes