In a medium bowl, mix together all ingredients except chicken, tomatoes and cilantro.
Place chicken in the bowl and cover with jerk marinade. Marinate in fridge overnight or for at least four hours, stirring a few times.
Preheat oven to 375°F. Place chicken on a baking pan (discard excess marinade) and roast until cooked through, about 20 minutes. To grill, preheat grill to medium-high. Cook on each side for five to six minutes. Garnish with tomatoes and cilantro.
Per serving: 220 calories, 28 g protein, 9 g fat (2 g saturated fat), 7 g carbohydrates, 2 g fibre, 68 mg cholesterol, 390 mg sodium