Creating Chicken Salad With Grapes on a Bagel is straightforward. Just follow these simple steps:

1. Prepare Chicken: If not using pre-cooked chicken, cook the chicken by boiling or roasting until fully cooked, then allow it to cool before shredding or chopping.
2. Mix Ingredients: In a large bowl, combine the chopped chicken, halved grapes, diced celery, and red onion.
3. Combine Dressing: In a separate small bowl, mix together the mayonnaise and Dijon mustard, if using. Season with salt and pepper according to your taste preference.
4. Combine Salad and Dressing: Pour the dressing over the chicken mixture and stir thoroughly until everything is well coated.
5. Chill: Let the salad sit in the refrigerator for at least 15 minutes. This allows the flavors to meld beautifully. However, it can sit longer if desired.
6. Toast Bagels: While the salad is chilling, toast the bagels to your liking. Toasting adds texture and warmth, which enhances the overall experience.
7. Assemble: Take the toasted bagels and generously scoop the chicken salad mixture onto each one.
8. Garnish: Optionally, sprinkle with fresh herbs for added flavor and aesthetics.
9. Serve: Enjoy immediately for the best texture, or wrap the bagels for later consumption!