1 lb. hamburger
1/2 onion
8 oz. tomato sauce
1 env. taco seasoning

Brown hamburger and onion. Stir in tomato sauce and seasoning. Spread 1/2 (18 ounce) package refrigerator crescent rolls in greased 9x13 pan. Top with meat mixture, then 1 cup sour cream and 1 cup grated cheese. Spread remaining crescent rolls on top. Bake 20-25 minutes at 350 degrees until golden brown.