Preparation Heat the lard in a skillet over medium-high heat. Add the onion and fry, stirring often, until lightly browned, 4 to 5 minutes. Add the garlic and beans and begin to smash the beans with a bean or potato masher until they are pastelike but still have some lumps. Stir in the broth and salt and continue to smash and stir occasionally, for about 5 minutes. When the bean mixture begins to spew and sputter, lower the heat and cook, stirring occasionally, until the bottom of the pan stays clear for a moment when scraped with a spoon, another 5 to 7 minutes. Serve hot, and, if you want, sprinkle on the cheese. From La Cocina Mexicana: Many Cultures, One Cuisine by Marilyn Tausend with Ricardo Muñoz Zurita, © 2012 University of California Press