This flavorful vegan side dish is ever-so-slightly adapted from a recipe in The Millennium Cookbook. These yams are truly addictive. They are a beautiful bed for a filet of fish, and a perfect complement to Caribbean-inspired dishes such as jerked meat or tempeh. I've even been known to eat the leftovers cold, straight from the refrigerator! This is a savory sweet potato dish, rather than the traditional sweet ones - It emphasizes the flavors of garlic and thyme.