1 c. mayonnaise
2 tbsp. vinegar
1 1/2 tsp. salt
1 tsp. sugar
4 c. cooked, peeled, and cubed potatoes
1/4 tsp. pepper
1/2 c. chopped onion
2 hard boiled eggs, chopped
1 tbsp. mustard
2 tbsp. pimentos

Mix all ingredients. Refrigerate until ready to serve.