1 lb. hamburger
1 c. oatmeal
1/2 c. spaghetti sauce, any flavor
1/2 c. onion, chopped
1/3 c. Parmesan cheese, grated
1 egg
1 tbsp. Worcestershire sauce
1 tsp. black pepper
1 (4 oz.) can sliced mushrooms
1/2 c. green or black olives, chopped
1/2 c. shredded Mozzarella

Mix all ingredients above, except mushrooms, olives and cheese and form 2 hamburger patties. On top of one patty, layer the rest of the ingredients. Top with other patty and seal. Put in greased pan. Bake at 350 degrees for 40 to 45 minutes. Before serving top with 1 cup spaghetti sauce and more Mozzarella if desired.