6 c. sliced potatoes, partially precooked
1 lb. or more hamburger, browned
1 can Cheddar cheese soup
1/2 soup can milk
1 sm. onion, chopped
1 tsp. salt

Mix above ingredients and place in greased 9x13 inch pan. Pour 1 (8 oz.) can tomato sauce over top. Sprinkle on 1/2 teaspoon sugar and oregano to taste. Dot with butter. Cover and bake about 40 minutes or until potatoes are tender, at 350 degrees. Remove from oven and sprinkle with Parmesan cheese and Mozzarella cheese. Return to oven just long enough to melt cheese.