Start by placing the shredded chicken into a large mixing bowl. Add in the creamy mayonnaise, tangy Greek yogurt, and zesty Dijon mustard. Stir all ingredients together thoroughly until the chicken is evenly coated, creating a luscious base.
Next, introduce the finely chopped celery, halved red grapes, diced green apples, and chopped walnuts to the bowl. These additions will provide a delightful mix of flavors and textures.
Carefully fold the ingredients together, ensuring that everything is well combined without breaking apart the ingredients too much.
Once mixed, season your chicken salad with salt and pepper based on your taste preference. Feel free to adjust the creaminess and seasoning levels to your liking.
To enhance the flavors, cover the bowl with plastic wrap and place it in the refrigerator. Allow the chicken salad to chill for at least 30 minutes, letting the ingredients meld together beautifully.
When you are ready to serve, give the chicken salad a gentle stir to redistribute any settled ingredients. Garnish with freshly chopped parsley on top for a vibrant touch just before plating.