1 lb. box rigatoni or mostoccioli
1 med. onion, chopped
1 med. green pepper
1 can ripe olives
1 jar pimento stuffed green olives
5 stalks celery
1 tsp. parsley
1 tsp. oregano
1 can mushrooms
1/2 c. Parmesan
1 jar Italian dressing

Mix ingredients together. Marinate overnight.