- Pour 3 Tbsp. less sodium teriyaki sauce over chicken in large plastic food storage bag. Press air out of bag; close top securely. Turn bag over several times to coat chicken thoroughly. Refrigerate 1 to 2 hours; turn bag over occasionally.
- Meanwhile, toss together cucumber, radishes and green onion. Blend vinegar, sugar and remaining 1 Tbsp. less sodium teriyaki sauce. Pour over cucumber; stir to combine. Let stand 1 hour.
- Cook chicken on grill 4 to 5 inches from hot coals 12 minutes, or until chicken is no longer pink in center, turning over occasionally.
- Serve with cucumber salsa.