Peel the potatoes, wash. Cut the potatoes into fans (some not dorezaya one end). Coat a baking sheet with vegetable oil, to put on his potatoes. Salt and poperchit, on each lay a slice of butter. Bake in a preheated 180*C oven for 30 minutes. Grate cheese on a fine grater, mix with breadcrumbs. Remove the potatoes from the oven, sprinkle with cheese, bake another 15 minutes.