Kielbasa is a Polish sausage that is often flavored with garlic, pimento and cloves; sauerkraut is a German dish made from chopped cabbage fermented in its own juices. Both ethnic foods are quite popular in the United States.
Kielbasa is available either fresh or smoked. The word generally refers to pork sausage, but kielbasa sometimes contains beef as well, according to the Food Network. Authentic Polish kielbasa comes precooked and only needs to be heated up. Sauerkraut is made by finely shredding and salting cabbage and then applying pressure, often in a jar. The pressure squeezes the juices out of the cabbage, which causes the mixture to ferment. Sauerkraut was popularized in the United States by the Pennsylvania Dutch, who used the food's health properties to fight disease.