Combine 1/4 cup marinade, orange peel , and ginger. Grill or broil (again, best grilled) chicken for 8 minutes, brushing with half of the sauce. Turn chicken over, top with pineapple slices. Brush chicken and slices with remaining sauce. Grill an additional 8 minutes or until chicken is no longer pink and slices are lightly browned. Discard remaining marinade.