1 can cream of celery soup
1/2 c. mayonnaise
2 tbsp. cider vinegar
2 tbsp. chopped pimiento olives
2 tbsp. chopped onion
8 oz. corkscrew noodles (cooked & drained)
2 (6 oz.) cans tuna
1 pkg. frozen mixed vegetables, thawed (cook for a few minutes)

In a large bowl, stir together first 5 ingredients. Add macaroni and toss to coat well. Add tuna and vegetables. Toss gently, cover and chill 4 hours before serving.