1 c. mayonnaise
2 tbsp. cider vinegar
1/2 tsp. salt
1 tbsp. parsley
1/2 tsp. sugar
1/4 tsp. red pepper
4 c. potatoes, cooked, cubed (5 to 6 red potatoes)
2 ribs celery, chopped
2 hard cooked eggs, chopped
1 small onion, chopped

Combine first 6 ingredients in bowl and stir until smooth, add remaining ingredients and toss lightly until mixed well. Cover and chill.