14 oz. shell macaroni, cooked
12 oz. sour cream

Combine the above 2 ingredients.

2 lb. ground beef, browned and drained
1 onion, chopped
3 tsp. oregano (you can also use Italian seasoning)
32 oz. Ragu spaghetti sauce

Combine the above 4 ingredients.

16 oz. Mozzarella cheese

Layer the 3 ingredients in a casserole or crock pot. Bake at 350 degrees for 50 to 60 minutes. (If you use the crock pot, you will have to bake it for probably two hours.)