Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2                    Pounds potatoes (about 6 med
   1 1/2  cups          Mayonnaise or salad -- Dressing
   1      tablespoon    Vinegar
   1      tablespoon    Prepared mustard
   1      teaspoon      Salt
     1/4  teaspoon      Pepper
   2      medium        Stalks celery -- chopped
                        1 cup)
   1      medium        Onion -- chopped
     1/2                cup)
   1      can           (4 ounces) chopped green -- Chilies, drained
   2                    Avocados -- chopped
   2                    Tomatoes -- chopped

Preparation:

Prepare and cook potatoes; cool slightly. Cut into cubes (about 6 cups). Mix mayonnaise, vinegar, mustard, salt and pepper in large glass or plastic bowl. Add potatoes, celery and onion; toss. Stir in chilies. Cover and refrigerate at least 4 hours. Before serving stir in avocados and tomatoes.