Rub the chicken down with olive oil/butter and salt and cook it in an oven at 450 degrees F for approximately an hour. Cook until the juices run clear and the thick meat of the breast is no longer pink. While your chicken is roasting away in the oven, combine all ingredients for the sauce in a saucepan and have it simmer until the raisins plump up and the sauce reduces slightly. Remove the pan from heat, and, when the chicken is done, spread the sauce and raisins over the bird.