Step 1

Position a rack in the middle of the oven and preheat to 400 degrees.

Step 2

Grease a large, rimmed baking sheet with oil and add the sauerkraut, cabbage, onion and mustard. Using tongs or your hands, mix until the mustard is evenly distributed and then flatten into an even layer.

Step 3

Nestle the sausages atop the vegetables and pour the cider over everything. Roast for 15 minutes, then rotate the pan front to back and roast for another 15 minutes, or until the sausages are cooked through and the cabbage and onions are tender. Add the thyme sprigs, if using, before serving family-style with additional crusty bread, sandwich rolls or potatoes and mustard, if using.