lb. hamburger
1 tbsp. chopped onion
2 pkg. taco seasoning
2 (8 oz.) cans tomato sauce
1 1/2 c. sour cream
2 (4 oz.) cans green chilies
1 pkg. nacho cheese tortilla chips
8 oz. pkg. sharp cheddar cheese

Brown hamburger and onions. Drain. Add seasoning and tomato sauce. Bring to boil and cook 5 minutes stirring constantly. Remove from heat. Combine sour cream and chilies. Layer in lightly buttered 13 inch baking dish; crushed tortilla chips, meat mixture, sour cream, and cheese. Repeat layers. Bake at 350 degrees for 10 minutes.