1 1/2 to 2 lb. hamburger, fried & drained
Sliced potatoes
Chopped onion
Chopped celery
4 oz. can mushrooms, drained
2 (8 oz.) cans tomato sauce
Oregano
Garlic salt
8 oz. pkg. mozzarella cheese

Put hamburger in baking dish. Cover with potatoes. Saute onion, celery and mushrooms in butter. Pour over potatoes. Add sauce. Sprinkle with seasonings. Top with cheese. Bake for 2 hours at 350 degrees or in microwave for 30 minutes.