In a medium bowl, stir together the yogurt, mayonnaise, lime juice, curry powder, and grated ginger. Toss dressing with the shredded chicken, apples, celery, and grapes until everything is completely coated. Cover and refrigerate for at least 1 hour until ready to serve.
TIP: Curry is a generic term for any South Asian Spice Blend, so the flavors and heat can vary. For a spicy curry blend, look for the word “Muchi” on the label.