Prepare the ingredients:Dice the apple, halve the grapes, and chop the celery and nuts (if using).
Combine in a bowl:In a large mixing bowl, add the cooked chicken, grapes, apple, celery, and nuts.
Mix the dressing:In a small bowl, whisk together the mayonnaise (or Greek yogurt), lemon juice, salt, and pepper.
Toss and coat:Pour the dressing over the chicken mixture and gently toss until everything is evenly coated.
Chill or serve immediately:You can serve it right away or refrigerate for 30 minutes for a colder, more refreshing flavor.
Enjoy!Serve on lettuce leaves, in a sandwich, or with crackers for a satisfying meal.