Cubed, cooked chicken breasts

• reduced-sodium soy sauce • dried basil • freshly ground black pepper • balsamic vinegar • crumbled Blue cheese • freshly squeezed lemon juice • boneless, skinless chicken breast • garlic cloves, peeled • garlic cloves, peeled and chopped • light vegetable oil cooking spray • large red onion, trimmed and cut into 1/8-inch rounds • mixed salad greens 6 c • medium tomato, cored and cut into 8 wedges