Ingredients

4 tablespoons unsalted butter

2 medium onions, thinly sliced

3 pounds green cabbage (about 1 head), cored and thinly sliced

1 large, tart green apple, such as ‘Granny Smith,’ peeled, cored, and chopped

1 cup apple cider

1/3 cup cider vinegar

2 tablespoons packed light-brown sugar

1 tablespoon coarse salt

1 teaspoon freshly ground pepper

9 knockwurst (about 2 pounds)

Whole-grain mustard, for serving

Preparation

Melt butter in a large heavy-bottomed pot over medium-low heat. Add onions; cook, stirring occasionally, until very soft and golden brown, about 18 minutes.

Stir in cabbage, apple, cider, vinegar, sugar, salt, and pepper. Cover; cook, stirring occasionally, until cabbage is very soft, about 1 hour.

Tuck sausages into cabbage; cover pot. Cook until heated through, about 20 minutes. Serve with mustard.