For the skillet
01 -
1 tablespoon olive oil
02 -
1/2 large yellow onion, chopped
03 -
1 large red bell pepper, diced
04 -
4 cloves garlic, minced
05 -
2 tablespoons white wine vinegar
06 -
14 oz (400 g) smoked kielbasa, sliced into 1/4-inch coins
07 -
1 small head green cabbage, cored and thinly sliced, about 1 1/2 lb (680 g)
For the mustard finish
08 -
3 tablespoons unsalted butter
09 -
1 tablespoon Dijon mustard
10 -
1 teaspoon sweet paprika
11 -
1/4 teaspoon crushed red pepper flakes, plus more to taste
12 -
3/4 teaspoon kosher salt, plus more as needed
13 -
1/2 teaspoon freshly ground black pepper
14 -
2 tablespoons chopped fresh parsley, optional