In a large saucepan, saute garlic in butter until tender. Add the next 8 ingredients. Bring to a boil, stirring constantly. Remove from the heat; set aside. , On a lightly greased grill rack, grill chicken, covered, over medium heat for 30 minutes, turning occasionally. Baste with sauce. Grill 15 minutes longer or until a thermometer reaches 170°, basting and turning several times.