Raw potatoes, sliced
Onion
1 lb. hamburger
1 can Cheddar cheese soup
1 (15 oz.) can tomato sauce
Mozzarella cheese
Oregano

Line a 9 x 13 inch pan with 2 layers of potatoes. Brown hamburger with onion and drain. Add soup. Pour over potatoes. Spread tomato sauce over mixture and sprinkle with oregano. Cover with foil. Bake 1 to 1 1/4 hours at 350 degrees. Sprinkle cheese over pan the last 5 minutes.