6 raw bratwurst sausages
2 tablespoons canola or safflower oil
1 onion, thinly sliced
1 granny smith apple, thinly sliced
12 ounces malty, German-style beer such as a gold or amber lager or Märzen (Oktoberfest style)
¼ cup apple cider vinegar
1 pound sauerkraut (see sidebar)
1 tablespoon whole grain mustard, plus extra for serving
4-5 dried bay leaves
1 teaspoon caraway seeds
1 teaspoon kosher salt
¼ teaspoon ground black pepper
6 crusty sausage rolls
Directions
Preheat over high...