1: In a large bowl, combine cooked chicken, diced celery, finely chopped red onion, dill, chopped pecans or almonds, and cranberries or grapes.
2: In a separate bowl, mix together plain Greek yogurt, mayo, Dijon mustard, vinegar, salt, and black pepper.
3: Pour the dressing over the chicken salad mixture and mix well.
4: Serve immediately or refrigerate for later use.
