MIX dressing and seasonings. Pour over chicken in shallow glass or plastic dish; cover. Refrigerate 2 to 3 hours to marinate. Drain; discard marinade.
PREHEAT broiler. Place chicken on rack of broiler pan. Broil, 4 to 6 inches from heat, 3 to 4 min. on each side or until cooked through.
PLACE chicken on serving plate; sprinkle with the cucumber and onions.
serving size = 1/6 th recipe