Stir the soup, honey, mustard and onion powder in a 1-quart saucepan.
Lightly oil the grill rack and heat the grill to medium. Grill the chicken for 20 minutes, turning the chicken over once during grilling. Brush the chicken with the soup mixture and grill for 15 minutes or until cooked through, turning and brushing often with the soup mixture.
Heat the remaining soup mixture to a boil and serve with the chicken.