Potato rosti is believed to be a north European side dish made of potatoes, butter, cheese and salt. The rostis are very high on fat and calories but extremely delicious to taste. Commonly made in most American homes, Potato rosti is very easy to make and cooks in very less time. Though it is mostly made on the stove, it is also often baken in an oven. Potato rosti recipes include Sweet Potato Rosti and Potato Pumpkin Rosti.