PREHEAT grill to medium heat. Place chicken on greased grill. Brush with barbecue sauce. Grill, covered, 4 minutes.
ADD vegetables to grill. Continue grilling chicken and vegetables 4 to 5 minutes on each side or until chicken is cooked through and vegetables are tender, frequently brushing chicken with barbecue sauce and vegetables with Italian dressing. Slice chicken and vegetables.
TOSS chicken, vegetables and greens. Serve with Ranch dressing. Sprinkle with KRAFT Shredded Cheddar Cheese, if desired.