Preheat oven to 350 degrees
Grease an 8 x 8 baking dish
In a large mixing bowl add
1 lb. ground beef
1 cup grated parmesan cheese
1 egg
1/2 tsp. pepper
1/2 Cup onion, chopped
1 Cup oats
Mix well
Press 1/2 of the beef mixture into the bottom of the baking dish
Sprinkle
1 Cup mozzarella cheese over the hamburger
Over the cheese add
1/2 of (1) 12oz can of black olives
1 cup of the spaghetti sauce over the cheese
Spread the remaining beef mixture over top
Sprinkle additional mozzarella cheese, olives and spaghetti sauce over the top
Bake for 45 minutes or until browned and bubbly