2 lbs. hamburger
1 sm. onion, finely chopped
1 c. celery, finely chopped
Mashed potatoes
Tomato sauce or canned tomatoes (chopped)
Grated Mozzarella cheese

Brown hamburger, onion and celery. Layer ingredients, starting with mashed potatoes and ending with potatoes. Top with cheese. Bake at 350 degrees until bubbly hot.