This is a dish that is made in Spring in Malta and the Middle East with fresh broad beans. For the rest of the year it is made with dried broad beans. There are two types of dried broad beans (generally called dried Fava beans). The first, commonly available here, are large, darker coloured beans. Huge, really. They are not peeled, so require soaking and peeling before cooking. Despite the work, I do love the intense earthy flavour of these large beans.
The second type is a more delicate dried fava bean, small in size and golden in colour. These are generally already peeled, and so less work in the kitchen before cooking. They are more difficult to find, and I had to search them out in a large Greek grocery.
Today, I am using the smaller variety, as I think that they are better suited to this dish, but note that the larger beans or fresh broad beans can also be used. It is just the cooking time that will vary.