Place whole pork tenderloin into a slow cooker. Arrange potatoes around pork. Cover the pork and potatoes with the sauerkraut and juices. Add 1 cup water, butter. Add salt and pepper to taste.
This quick cook sauerkraut is a short cut to the real thing ... chilli flakes and cider. Cover the pot and bring the water up to the boil. Skim off any scum that comes to the surface, then ...