Spray a skillet with nonstick spray and sauté onion, pepper, and garlic until softened, 6-8 minutes on medium heat
Place onion mixture in a large bowl, add in thawed corn, green chiles, black beans, cumin, salt and pepper. Then pour in Enchilada Sauce (reserving 2 tablespoons) mix thoroughly
Pour remaining sauce into a13x9 casserole dish and spread evenly.
Place half of the torn tortillas on the bottom of the dish, place half of veggie mixture on top and spread evenly, place 6 spoonfuls of sour cream on top, then sprinkle with half of the cheese.
Cover with tortillas, veggies and finish with remaining cheese.