Causa de atún - Tuna Fish Potato Loaf

Generally speaking, a causa is a cold dish made with a layer of the aforementioned potato mash, a layer of filling, and another layer of mash. The original version is called causa limeña and it’s filled with pulled chicken, mayo and avocado. These days you can find thousands of versions available, with different meats (or veggies) in the filling and different tubers in the mash. There’s a restaurant in Lima called Mi Causa which serves a lot of versions, including one with German sausages. Some cooks also roll their causas sushi-style for a more interesting presentation.