1 (16 oz.) pkg. spaghetti (cooked and cooled)
1 cucumber (chopped with seeds removed)
1 med. onion (chopped)
1 med. green pepper (chopped)
2 pkg. Good Seasons Italian dressing mixed according to pkg. directions
2 bottles McCormick Salad Supreme
Fresh mushrooms and chopped celery (optional)

Mix as stated and let stand at least 3 hours. Better if refrigerated overnight.