Brown ground beef and onion in skillet. Add salt, to taste, pepper and tomato sauce; simmer slowly while preparing remaining ingredients. Combine cottage cheese, cream cheese, sour cream, green pepper and green onion.
Place half of cooked noodles in a greased 3 quart baking dish. Top with cheese mixture over top, and then remaining noodles. Pour meat mixture over top. Bake at 350 degrees for 30 minutes. Yields 8 to 10 servings.