Step 1

Fit a wire rack in a sheet tray. Liberally sprinkle the pork shoulder with salt and pepper, then place on the sheet tray and refrigerate, uncovered, 8 hours or up to overnight.

Step 2

Heat a large Dutch oven over medium-high heat. Add the sausage to the pan and brown the links on both sides, about 5 minutes per side. Remove the sausage to a plate. Fry the sprigs of rosemary in the fat, flipping frequently, until fragrant, about 1 minute. Remove to the plate with the sausage.

Step 3

If the pork shoulder is wet, dry thoroughly with paper towels. Add the pork to the Dutch oven and brown on all sides until deeply browned, about 5 minutes per side. Remove the pork to a large plate or baking dish.

Step 4

Add the cabbage and onions to the Dutch oven and sprinkle with salt and pepper. Cook over medium heat until the vegetables have softened slightly, about 5 minutes. Add the potatoes, wine, mustard and caraway seeds and cook until the wine has almost evaporated, another 8 minutes. Return the pork, sausages and fried rosemary sprigs to the Dutch oven, then add the stock and bring to a simmer. Cover and reduce the heat to low. Let braise until the pork is very tender, about 3 hours.

Step 5

For a thicker, richer sauce, strain the liquid from the Dutch oven and reduce over medium heat in a small saucepan until it reaches a thin gravy consistency, 7 to 10 minutes. Season the sauce to taste with white wine vinegar, salt and pepper.

Step 6

To prepare the horseradish sauce, mix together the sour cream and prepared horseradish (add horseradish a tablespoon at a time to taste if you want a milder sauce). Season with salt and pepper.

Step 7

Remove the pork and sausages to a large serving dish. Shred the pork using two forks. Pour the sauce over the top and garnish with fresh parsley. Serve with sour cream horseradish sauce alongside.