2-3 lbs. hamburger
1 med. onion
1 can cream of mushroom soup
8 oz. taco sauce
4 oz. diced green chilies
1 lb. grated Cheddar cheese
10-12 flour tortillas

Brown hamburger and onion; drain grease. Add soup and taco sauce and chilies. Layer tortillas, meat mixture, cheese - repeat. Bake in 350 degree oven for 20 minutes. Let set 5 to 10 minutes before serving.