Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      large         eating apples
   2      teaspoons     lemon juice
   1      cup           diced celery
     1/4  teaspoon      salt
     1/2  cup           mayonnaise
   1      teaspoon      powdered sugar
     1/4  cup           sour cream
     1/3  cup           coarsely broken walnuts

Preparation:

Core apples. Pare, if desired, or leave red-skinned apples unpeeled. Dice them and sprinkle with lemon juice. Combine apples with celery and salt. Blend together mayonnaise, sugar, and sour cream. Pour over apple mixture, tossing lightly with a fork until apple pieces are well coated. Arrange salad in lettuce cups. Sprinkle with walnuts.