Cook Chicken: Poach or grill chicken breasts until fully cooked, then cool.
Shred Chicken: Shred or dice the chicken into bite-sized pieces.
Chop Veggies: Dice celery, onions, and any other preferred vegetables.
Mix Ingredients: Combine chicken, veggies, and a handful of nuts in a large bowl.
Prepare Dressing: Whisk together mayonnaise, Dijon mustard, lemon juice, salt, and pepper.
Toss Salad: Pour dressing over the chicken mixture and toss until well-coated.
Add Fresh Herbs: Stir in chopped fresh herbs like parsley or dill for extra flavor.
Chill Salad: Refrigerate for at least 30 minutes to let flavors meld.
Serve: Serve chilled on a bed of lettuce, in a sandwich, or with crackers.