1 lb. hamburger, brown with onion and cool
1 can (8 oz.) tomato soup
3/4 c. green and black olives, mixed
1/2 c. mayonnaise
1 sm. can mushrooms
Pinch of oregano
1/2 lb. grated Mozzarella cheese

Mix above with hamburger. Put on 1/2 hamburger buns. Bake at 300 degrees for 30 minutes. Serve hot.