1 lb. hamburger
4 c. potatoes, sliced thin
1 can cheddar cheese soup
1/2 c. milk
1 (15 oz.) can tomato sauce
1/2 tsp. salt
1/2 tsp. pepper
1/2 tsp. oregano
6-8 oz. Mozzarella cheese
1/2 c. Parmesan cheese
1 onion

Cook potatoes until half done. Brown hamburger and onions. Layer meat and potatoes in pan. Mix soup and milk and pour over potatoes. Sprinkle on seasoning. Pour tomato sauce over, dot on with butter. Bake covered for 1 hour at 375 degrees uncovered and add cheese; bake 15 minutes longer.