Galician White Bean Soup

Caldo gallego, a bracing, nourishing white bean potage, has become something of an ambassador of Spanish cuisine abroad, thanks to the scores of Galician immigrants who settled in the Americas in the early twentieth century. The greens customarily used for this soup are called grelos (a kind of turnip green)—one quintessential Galician sight is of old women carrying huge baskets of grelos on their heads as they return from the market. The consistency of the soup varies