Combine everything but the chicken in a small bowl. Whisk to dissolve brown sugar. Place marinade and chicken in a zip-lock bag. Pop that bag in the fridge for a minimum of 4 hours, or longer if you have it (even overnight). Preheat a grill (or an indoor grill pan or broiler). Spray cooking surface with cooking spray and place chicken on it to cook. Cook for 5-10 minutes on each side depending on the thickness. Optional: garnish with sliced green onions and serve with some healthy sides like brown rice and broccoli. *Tip: When I make this I usually make 1 1/2 times the marinade. I reserve some of the marinade before adding the chicken and then use it in the last few minutes of grilling, or just brush it on after for extra flavor.