Heat olive oil in a large skillet and saute’ mushrooms, onion and bell peppers. Season with crushed red pepper flakes, salt, pepper, chili powder and cumin. Cook until tender and add garlic. Add zucchini and black beans and remove from heat.
Pre-heat oven to 375ยบ. Warm tortillas in microwave under a moistened paper towel for about 15 seconds. Grease a 9 x 13 casserole dish and spread about 1/8 cup of enchilada sauce in the bottom of the dish. Holding a tortilla, fill it with about 1/6 of the bean mixture and carefully roll up and place in dish. Repeat with remaining tortillas. (If you have left over bean mixture, you can spread it on top of the enchiladas). Pour enchilada sauce evenly over all of the tortillas, covering each of them. Sprinkle cheese and cover with non-stick foil. Bake for 20 minutes and then remove foil and bake for another 5 minutes.
Top with chopped green onions, cilantro and tomato. Serve immediately.