It is often considered to be the national dish of Vaud; the potatoes and leeks happen to have the same colors as the cantonal flag: white and green.
Papet Vaudois is prepared by boiling potatoes and leeks together, often with cream and white wine.
Although typically well cooked until the ingredients achieve a melt-in-the-mouth consistency, leeks and potatoes retain their shapes are not mashed together.
[1] The French term papet is derived from papette, which means "porridge".
[4] Since 2009, the Vaud butchers' association has organized the Journée du Papet vaudois on the 1st Friday of October.