Combine 1/2 cup Balsamic Vinaigrette and chicken in a shallow dish. Cover and marinate in refrigerator 1 hour.
Remove chicken from dish; discard marinade. Place chicken on broiler pan coated with cooking spray; cook for 6 minutes on each side or until done.
Combine remaining Balsamic Vinaigrette and salad greens; toss well. Divide the greens mixture evenly among 4 plates; top each serving with 1 chicken breast half.
Totals include Balsamic Vinaigrette.