A runza (also called a bierock, fleischkuche, or Kraut Pirok) is a yeast dough bread pocket with a filling consisting of beef, pork, cabbage or sauerkraut, onions, and seasonings. They are baked in various shapes such as a half-moon, rectangle, round (bun), square, or triangle. In Nebraska, the Runza is usually baked in a rectangular shape. The bierocks of Kansas, on the other hand, are generally baked in the shape of a bun.