In a large bowl, combine the shredded chicken, Greek yogurt, and mayonnaise.
Add the curry powder and mix well until the chicken is evenly coated.
Stir in the diced celery for crunch.
Fold in the diced apples for sweetness.
Add the raisins for a chewy texture.
Incorporate the chopped walnuts for added crunch.
Season with salt and pepper to taste.
Chill the mixture in the refrigerator for at least 30 minutes.
Prepare a bed of mixed greens on a serving platter.
Serve the chilled curry chicken salad on top of the greens.