Gratin polesano is a traditional dish originating from Veneto. The dish is usually made with a combination of potatoes, pancetta, fontina cheese, chicken or beef stock, butter, salt, and pepper. In order to make the dish, a deep ovenproof dish is buttered and some of the stock is poured into it, then brought to a boil.
The potatoes are sliced and arranged in the dish while being covered by the hot stock. The potatoes are cooked until tender and the stock should evaporate. It's then topped with fontina and pancetta, seasoned, and covered with the remaining potatoes.