Loosley based on various recipes I found on the internet but it is with Jesus Tarifa's, our chef here at the home, help and guidance that brought the recipe to post. It brings back a lot of fond memories but when it was made in our home in Cuba it was made with bacon and chorizos only! It is a robust soup that is hearty and delicious! It is a whole meal and is wonderful! It hails from Spain but the Cubans adopted it as their own, as they have with many of their recipes. Here, we have made it with collard greens but it can be made with Swiss chard, kale, or even spinach. These beans do better if soaked overnight.