Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      medium        apple -- thinly sliced
     3/4  cup           celery -- thinly sliced
   1      tablespoon    prepared mustard
     1/2  teaspoon      salt
     1/4  teaspoon      pepper
                        few drops of lemon juice
     1/4  cup           sour cream

Preparation:

In salad bowl, combine apple and celery. In mixing bowl, combine mustard, salt, pepper, and lemon juice. Mix well. Stir in sour cream. Blend well. Add to apple-celery mixture. Toss gently but thoroughly. Recipe Source: THE ART OF FRENCH COOKING by Fernande Garvin