The roots of Piedmontese plin date back to the early 20th century. This stuffed pasta has been included in the list of traditional Italian culinary products. Their history is quite uncertain, but it is thought that they originated with the aim of recovering all the leftovers from the roast. Originally, pasta al plin had a round shape. Over time, it changed its appearance, becoming rectangular. Nowadays, its shape is universal, with the application of a small pinch, thanks to which the ravioli are closed in a perfect way.