Step 1: Combine Chicken and Vegetables: In a medium-sized bowl, gently combine the diced cooked chicken, chopped celery, and diced red onion. Ensure the ingredients are evenly distributed for a consistent texture in each bite.
Step 2: Prepare the Dressing: In a separate small bowl, whisk together the mayonnaise, Dijon mustard, lemon juice, salt, and pepper until smooth and well combined. The dressing should be creamy and have a balanced flavor.
Step 3: Combine Dressing and Chicken Mixture: Pour the prepared dressing over the chicken and vegetable mixture. Gently fold the ingredients together until the chicken and vegetables are evenly coated with the dressing. Be careful not to overmix, as this can make the chicken salad mushy.
Step 4: Add Optional Ingredients: If desired, gently fold in the halved grapes and chopped fresh parsley. These additions can enhance the flavor and texture of the chicken salad.
Step 5: Chill and Serve: Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to allow the flavors to meld together. Serve the chicken salad on croissants, bread, crackers, or lettuce cups.
Optional tips: For a sweeter flavor, add a tablespoon of honey or maple syrup to the dressing. If you prefer a tangier flavor, increase the amount of lemon juice. For a spicier kick, add a pinch of cayenne pepper or a dash of hot sauce to the dressing. To make a lighter version, substitute Greek yogurt for half of the mayonnaise. Cooked turkey can be substituted for chicken.