This slow cooker kielbasa and sauerkraut is a classic combination of ingredients. Sauerkraut and sliced apples complement the kielbasa in this tasty slow dish you can start in the morning and enjoy for dinner. The optional caraway seeds add some texture and flavor, and the brown sugar gives the dish its wonderful sweet-sour taste. Kielbasa is a polish sausage that can be found in most supermarkets in the u. S. The smoked sausage is usually made with beef, pork, or turkey. The word "Kielbasa" Means "Sausage" In polish. Many of the smoked sausages available in the supermarket are pre-cooked and so you really will only be reheating the sausage in the slow cooker. People generally either love sauerkraut or can't stand it. This fermented cabbage has a strong flavor, but it is balanced in this dish with the sweetness of the apple and sugar and mellowed by rinsing and wringing out the sauerkraut to remove the brine. You can vary the amount of sugar to suit your taste. This is an easy slow cooker dish that makes a nice family dinner. Or take the finished dish along to a potluck dinner or tailgating event and serve it hot from the slow cooker.