8 oz. shredded Mozzarella
8 oz. shredded cheddar
5 oz. sliced green olives with pimento
4 oz. sliced mushrooms
1 c. sliced black olives
1 onion, chopped fine
2 c. mayonnaise (1/2 Miracle Whip, 1/2 regular mayonnaise)
1 pkg. pepperoni

Mix all ingredients except pepperoni. Bake at 350 degrees for 30 minutes in 7x11 or square Corning pan. Cool slightly. Serve with tortilla chips.