The 12th-century Benedictine Abbess Hildegard of Bingen was blessed with an astonishing array of talents. She was, among other things, a mystic, naturalist, visionary, and composer. Hildegard was also granted, by means of heavenly visions, in-depth knowledge about human nutrition. She believed "foods of joy" revitalized us and helped preserve good health in every sphere--physical, spiritual, and psychological. Now, famed French chef Jany...