Marinade * 1/3 cup (80 ml) fresh orange juice * 1/4 cup (60 ml) fresh lemon juice * 1/4 cup (60 ml) extra virgin olive oil * 1/4 cup (60 ml) Barbados Sugar * 1/4 cup (60 ml) frozen lemon juice concentrate, thawed * 3 tablespoons (45 ml) fresh lime juice * 3 tablespoons (45 ml) chopped fresh mint leaves * 2 teaspoons (10 ml) grated orange peel * 2 teaspoons (10 ml) grated lemon peel * 1 teaspoon (5 ml) grated lime peel * 1/4 teaspoon (1 ml) ground cumin * 1/4 teaspoon (1 ml) ground cinnamon * 1/4 teaspoon (1 ml) salt * 1/8 teaspoon (0.5 ml) ground pepper * 4 Chicken breast halves with ribs * 1/4 red onion, thinly sliced