Rustic Farro Soup with Saugage and Mushrooms

This fragrant soup, with a foundation of vitamin-rich farro grain, will both satisfy your appetite and warm you up on a chilly winter day. The full flavors of Italian sausage and mushrooms combine with carrots, celery, escarole and onions for a truly hearty meal. This rare grain can easily be substituted with spelt, another ancient form of wheat that is more readily available.