In a large mixing bowl whisk together the mayonnaise, yogurt, honey, lemon juice, and salt.
To the dressing, add the chopped apples, halved grapes, celery, cranberries, and walnuts.
Toss to combine.
Taste and adjust.
Cover and refrigerate for 1 hour, or keep refrigerated for up to 3 days.
Spoon salad on lettuce.
