Using a food processor to make a honey mustard glaze adds a sweet and tangy flavor to air fryer chicken breast. Combine Dijon mustard, honey, garlic, vinegar, salt, and pepper in the food processor. Process until you have a smooth glaze. Coat the chicken breast with the glaze and let it marinate for at least 30 minutes. Then, place the chicken breast in the air fryer and cook until it's cooked through and caramelized. The result is a succulent chicken breast with a sticky and flavorful honey mustard glaze.