Combine the salt, cinnamon, cloves and nutmeg; rub over chicken. In a small bowl, combine the glaze ingredients; set aside. In a small bowl, combine the peach, peppers, onion, mint and 1 tablespoon glaze; set aside.
Lightly oil the grill rack. Grill chicken, covered, over medium heat or broil 4 in. from the heat for 6-8 minutes on each side or until a thermometer reads 170°, basting frequently with reserved glaze. Serve with reserved relish.