2 large red apples, chopped
2 large green apples, chopped
2 celery, diced
1 c. low-fat lemon yogurt
4 tbsp. mayonnaise
1/2 c. chopped walnuts
1 c. seedless grapes, cut in half

Stir together apples, celery, yogurt, grapes and mayonnaise. Just before serving, add walnuts.