Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
6         medium        boiling potatoes (2 pounds)
1 1/2     cups          mayonnaise or salad dressing
1         tablespoon    white or cider vinegar
1         tablespoon    mustard
1         teaspoon      salt
1/4       teaspoon      pepper
2         medium        stalks celery, chopped (1 cup)
1         medium        onion, chopped (1/2 cup)
4                       hard-cooked eggs, chopped

Preparation:

1. Heat 1 inch water (salted if desired) to boiling; add potatoes. Cover and heat to boiling; reduce heat. Cook 30 to 35 minutes or until potatoes are tender; drain. Cool slightly; cut into cubes (about 6 cups). 2. Mix mayonnaise, vinegar, mustard, salt, and pepper in large glass or plastic bowl. Add potatoes, celery, and onion; toss. Stir in eggs. Cover and refrigerate at least 4 hours to blend flavors.