This is one of those dishes that came about because of what I had to hand on the day — I was about to embark on a traditional rice filling, when I remembered the bag of black chickpeas (garbanzo beans) I wanted to experiment with. The black pudding — especially the Spanish sort, morcilla, works really well with them. The texture of the black pudding is quite important; you need a crumbly one, nothing too dense, as this will make the sauce claggy. For US cup measures, use the toggle at the top of the ingredients list.