Prepare the Chicken:
Use cooled, cooked chicken—rotisserie, poached, or leftover grilled chicken. Dice or shred into evenly sized pieces for uniform texture.
Chop the Vegetables:
Finely chop celery and onions. Add optional grapes, apples, or nuts if using. Uniform chopping ensures balanced texture in every bite.
Make the Dressing:
In a bowl, whisk together mayonnaise, Dijon mustard, lemon juice, salt, and pepper until smooth and creamy. Add Greek yogurt for a lighter dressing if desired.
Combine Ingredients:
Add the chicken, celery, onions, and optional mix-ins to the dressing. Fold gently to coat everything evenly without breaking the chicken pieces.
Chill and Serve:
Refrigerate for 30 minutes to allow flavors to develop. Serve on sandwiches, croissants, in lettuce wraps, or with crackers.