Patate arraganate is a traditional dish originating from Basilicata. It's made with a combination of potatoes, onions, tomatoes, oregano, Parmigiano-Reggiano, breadcrumbs, olive oil, and seasonings. In order to prepare it, the potatoes, onions, tomatoes, and olive oil are mixed in one bowl, while the cheese, breadcrumbs, olive oil, oregano, and pepper are mixed in another.