Ensalada de Frijoles NegroAlthough beans have been part of Mexican meals for centuries—usually served hot with or after a meal—only recently have they been used to make delectable salads. Black beans are an excellent salad choice.To help the beans hold their shape while cooking, I use a cook-soak method allowing the starches to expand slowly, keeping the skins intact. If you pay attention to the cooking, the beans should be whole and tender when finished.