Potatoes thoroughly wash and peel. Pierce from all sides with a fork. Spread very well with butter. Arranged in a shallow baking dish and bake in the oven for 40 minutes at 160 C. Then, turn and bake another 40 minutes at 160 C. The finished potatoes are cut crosswise from one side, add salt and put a slice of butter, scatter is with ground black pepper and sprinkle with plenty of grated cheese.