Paipet fier or pépéfier is a traditional and rural French dish originating from Doubs. The dish is made with a combination of Montbéliard sausages (made from pork and smoked), potatoes, flour, olive oil, wine vinegar, and seasonings.
The potatoes are peeled, sliced, cooked, and drained. The sausages are boiled and sliced. The flour is stirred in olive oil and cooked, then mixed with the cooking water from the sausages in order to form a creamy sauce. The sauce is seasoned, mixed with the vinegar, then combined with the potatoes and sausages before serving.