Spray casserole dish with non stick spray. Preheat oven to 350

Brown ground beef and onions and drain

Add taco seasoning and cook according to package

Layer 1 tortilla in bottom of baking dish and spread 1/3 of the beans, 1/3 of the meat, and sprinkle cheese

Layer 2 tortilla 1/2 the rice, 1/2 salsa, 1/2 the corn and sprinkle some cheese

Layer 3 tortilla 1/3 the beans, 1/3 the meat, and sprinkle some cheese

Layer 4 tortilla, beans, meat, corn, rice, salsa, and cheese

Cover with foil

Bake for 30-40 minutes

Remove foil and bake additional 10-15 minutes

After baking top with sour cream, diced onions, and shredded lettuce if desired