1 (8 ounce) package spaghetti
3 tablespoons melted butter
1 1/2 to 2 pounds ground chuck
16 ounces tomato sauce
8 ounces sour cream
8 ounces cream cheese
12 ounces cottage cheese
1/3 cup chopped onion
Salt, to taste
Pepper, to taste

Cook spaghetti until just tender, not well done. Brown meat in 1 tablespoon butter. Add salt, pepper and tomato sauce. 

In a bowl, combine cottage cheese, cream cheese, sour cream and onion.

Drain spaghetti. Place spaghetti in the bottom of a 2-quart casserole. Add 1/2 mixture of cheeses and 1/2 mixture of meat. Add remaining mixtures in same order with meat mixture on top. Pour 2 tablespoons melted butter over top and bake uncovered at 350 degrees F for 30 minutes.