Potatoes
Onion
1 (15 oz.) can tomato sauce
2 lbs. hamburger
1/4 tsp. oregano
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 for the last 5 minutes.