Creating this delightful Cranberry Chicken Salad is simple when you follow these steps:

1. Cook the Chicken: If using raw chicken, season it with salt and pepper. Cook it in a skillet over medium heat for 20-25 minutes, or until cooked through. Let it cool and then dice.
2. Prepare the Ingredients: Chop the celery and red onions. If using fresh cranberries, rinse them; if using dried cranberries, just measure.
3. Mix Ingredients: In a large mixing bowl, combine the cooked chicken, cranberries, celery, red grapes, and red onions.
4. Make the Dressing: In a separate bowl, whisk together mayonnaise, Dijon mustard, salt, and pepper until smooth.
5. Combine Everything: Pour the dressing over the chicken mixture, and stir gently until everything is coated evenly.
6. Add Nuts: Fold in the chopped walnuts or pecans for added crunch.
7. Chill: For the best flavor, cover the bowl and chill the salad in the refrigerator for at least 30 minutes before serving.
8. Garnish: If desired, garnish with fresh parsley before serving for an inviting finish.

Following these steps will help you create a flavorful Cranberry Chicken Salad that everyone will enjoy.