Preheat grill to medium heat. Place chicken on grill; cover grill and cook 12 to 15 minutes turning once until no longer pink in centre (165°F/74°C). Brush chicken occasionally with reserved seasoning mixture. Remove from heat and let stand 5 minutes. While chicken is cooking, wrap tortillas in foil and place on grill during last 5 to 7 minutes of cooking time, turning once.