To a large bowl, add the mayonnaise, Dijon and wholegrain mustard, honey, vinegar, garlic and black pepper.
Whisk together and add salt to taste.
Stir in the chicken, celery, apple, onion and pecans until everything is coated.
Refrigerate until you’re ready to serve, at least 15 minutes.
Notes
Dry the apple: Pat diced apple with a paper towel if it seems very juicy.
Fold gently: Stir until coated, since rough mixing can break down the chicken and apple.
Go easy on red onion: Raw onion can dominate the honey mustard dressing. Use a small dice. Sometimes, if an onion seems especially strong, I rinse it under cold running water for a minute.