In a small bowl, combine pecans and Terrapin Ridge Farms Peach Honey Mustard. Place chicken and pecan mixture in re-sealable plastic bag and shake gently to coat chicken with mixture. Preheat oven to 325 degrees. Transfer chicken to small baking dish and partially bake 15 minutes. Save pan juices from chicken. Prepare hot charcoal or preheat gas grill. Finish cooking breasts on grill. Plate chicken breasts and pour pan juices over chicken breasts.