You will need a large, 2-4 litre container with a lid, or a casserole or bowl with plastic wrap. Mix all ingredients except turkey breast together in a separate bowl to make brine. Place turkey breasts in the large container. Add brine and cover. Refrigerate overnight or no less than 4 hours. Preheat grill to 400ºF (200ºC). Spray grill with cooking spray and place turkey breasts bone side up. Grill for 5-7 minutes or until starting to brown. Flip on to bone side and continue to grill until done, approximately 20-30 minutes. Let rest for 5 minutes and serve. Oven Method: Preheat oven to 400ºF (200ºC). Place turkey breasts in a shallow baking dish, bone side down and roast uncovered for 35-40 minutes or until juices are clear.
Nutritional Information (Per serving): Calories: 448; Protein: 80 g; Fat: 7 g; Carbohydrates: 16 g.