Caribbean-Grilled Chicken with Citrus

1 14 1/2-ounce can chicken broth
3/4 cup frozen Florida Orange Juice Concentrate, thawed
2 tablespoons red wine vinegar
1 tablespoon Jamaican jerk seasoning
2 teaspoons finely shredded Florida Orange Peel
2 cloves garlic, minced
6 skinless, boneless medium chicken breast halves
4 teaspoons cornstarch
3 cups hot cooked rice
2 Florida Red Grapefruit, peeled, sliced, and seeded
2 Florida Oranges, peeled, sliced, and seeded
1/4 cup sliced green onions
Green onion brushes* (optional)

In a nonmetallic bowl stir together chicken broth, orange juice concentrate, vinegar, jerk seasoning, orange peel, and garlic. Cover and chill half of the mixture for sauce. Rinse chicken; pat dry. In a plastic bag set in a shallow dish combine chicken and remaining orange mixture. Close bag and chill for 2 to 24 hours, turning bag occasionally to distribute marinade. Drain off marinade and reserve. Place chicken on grill rack of an uncovered grill. Brush with some of the reserved marinade. Grill directly over medium coals 12 to 15 minutes or until chicken is tender and no longer pink, turning once. Discard marinade. Meanwhile, for sauce, in a medium saucepan combine the remaining chilled orange mixture with cornstarch. Cook and stir over medium heat until thickened and bubbly. Cook and stir for 2 minutes more. To serve, spoon rice on each of 6 dinner plates. Arrange grapefruit and orange slices on top of rice on each plate; place one piece of chicken on top of grapefruit and orange slices. Spoon fruit sauce over chicken and fruit. Sprinkle with green onions. If desired, garnish with green onion brushes. Serves 6.