8 oz. Cheddar cheese, shredded
8 oz. Mozzarella cheese, shredded
1 can mushrooms, drained
1/4 to 1/2 c. sliced green olives
1/4 to 1/2 c. chopped green pepper
1/4 c. chopped onion
2 c. mayonnaise

Mix all ingredients together. Bake at 350° for 10 minutes or heat in microwave until hot.