1½ cups dry white wine (preferably an Alsatian Riesling)
1 pound baby red-skin potatoes
Assorted mustards, for serving
Crusty bread, for serving
Directions
In an 8-quart Dutch oven, heat the duck fat over medium-high heat. Working in batches, cook the kielbasa, bacon, bratwurst and ribs, turning as needed, until golden brown, 4 to 6 minutes for the kielbasa and bacon, and 6 to 8 minutes for the bratwurst and ribs. Transfer each to a plate.
To the pot, add the sauerkraut, juniper berries, peppercorns, cloves, garlic and bay leaves. Cook until warmed through and fragrant, 3 minutes. Add the reserved meats, the stock and white wine, and bring to a simmer. Cook, covered, until the meat is tender, 1 hour. Add the potatoes and continue to cook until tender, 25 to 30 minutes more.
Transfer the meats to a cutting board and slice. Arrange on a platter with the braised sauerkraut and potatoes on the side, then serve with assorted mustards and crusty bread.