Raw potatoes, sliced
1 (15 oz.) can tomato sauce
2 lbs. hamburger
1/4 tsp. oregano
Onions, cut up
4 oz. pkg. Mozzarella cheese
1 can cheddar cheese soup

Line a 9"x13" cake pan with 2 layers of potatoes. Brown hamburger with onions and drain. Add soup to hamburger, pour over potatoes. Spread tomato sauce over the mixture and sprinkle with oregano. Cover with foil and bake 1 to 1 1/4 hours at 350 degrees. Sprinkle Mozzarella cheese over the last 5 minutes of baking.