Mix mayonnaise, lemon juice, salt and pepper. Toss with chicken and celery. Cover and refrigerate. Stir in grapes; serve in lettuce cups, ... Chicken - Bacon Salad: Omit grapes. Stir 4 ... macaroni. Chicken - Walnut Salad: Omit grapes. Stir in 1/3 cup coarsely chopped walnuts into salad just before serving. ... mixture into each tomato.