1 lb. med. macaroni shells, cooked
5 3/4 oz. can ripe olives, sliced
5 oz. jar green olives, sliced
2 c. shredded Mozzarella
1/2 c. chopped green pepper
1/2 c. chopped onion
1/2 c. chopped celery
3 oz. can sliced mushrooms
15 cherry tomatoes, halved
4 oz. pkg. sliced pepperoni
16 oz. bottle Italian dressing
1 tsp. dried oregano

Mix well. Refrigerate before serving.