Crunchy Waldorf Salad
["2 c. diced apples", "1 c. seedless grapes", "1 c. diced celery", "1 c. walnuts, chopped", "1/2 c. plain yogurt, mixed with 1 tsp. lemon juice"]
["Gently combine all ingredients.", "Chill until serving time. Serve on lettuce."]
["apples", "grapes", "celery", "walnuts", "plain yogurt"]