Soak the beans overnight in cold water. Cook the beans, I cooked it in a slow cooker on the “stewing” function for 1 hour and 20 minutes. Do not salt the beans. Do not pour out the broth from the beans, some of it will be useful for us when preparing the sauce. The necessary ingredients for the sauce. I cooked 0.5 cups of beans, after cooking it significantly increased in volume. For the sauce, you need to measure out one glass of beans.