My Spanish aunt (tia) is an amazing cook, and the last time we went to Spain she made this amazing, regional bean stew. She was happy to give me the recipe! You can get Spanish chorizo (do NOT use any other kind!! The dish will not taste right!!) and morcilla at specialty Spanish stores like La Tienda; they have a website from which you can order as well. Prep time includes the overnight soak on the beans. This is a low-and-slow dish; it takes a while to make, but is soooo worth it!