Leftover broth from cooked black beans is enhanced with chicken bouillon and served with toppings that include cooked rice, chopped cilantro, cubed avocado, sliced radishes or, simply, herbed croutons. Sometimes the soup is thickened with mashed beans. —Sandra A. Gutierrez is an award-winning cookbook author. Her newest book, Latinísimo: Home Recipes from the Twenty-One Countries of Latin America, is available on October 3.