1 c. mayonnaise
2 tbsp. vinegar
1 tbsp. prepared mustard
1 tsp. sugar
1 tsp. salt
1/4 tsp. pepper
8 oz. cooked macaroni
1 c. sliced celery
1 c. green pepper
1/4 c. chopped onion

In a large bowl, stir mayonnaise, vinegar, mustard, sugar, salt and pepper until smooth. Add macaroni, celery, green pepper and onion, toss to coat well. Cover; refrigerate at least 2 hours. Makes 5 cups.