A warm. filling soup is perfect for those cold days when you want a quick and easy meal that's satisfying too. The black turtle bean featured here has a meaty texture much like that of a mushroom and, combined with the larger couscous, makes for a dish high in fiber, iron, and tons of different antioxidants. Active ingredients in the beans include saponins, protease inhibitors and phytic acid, all of which have been shown to play a role in cancer prevention and may even slow tumor growth.