Place chicken breasts into a one-gallon freezer bag or other container.
Whisk together remaining ingredients, other than the green onions, in a small mixing bowl.
Pour the marinade over the chicken breasts and allow to marinate for at least two hours.
Preheat your grill to medium.
Remove chicken from marinade and place on grill, cooking on the first side for about 10 minutes.
Flip chicken, then cook on second side for about 10 more minutes or until a meat thermometer reads 165 degrees.
Serve.