Chop 1 lb beef or veal, boiled or fried, with an onion, stir in 2 spoons of grated roll, and fry in 1 spoon butter. Beat in 1 egg and add 2 spoons sour cream and a little salt. Spread this mixture on slices of a roll, sprinkle with Parmesan cheese, and dry out slightly in the oven on a baking sheet* greased with butter.
Alternatively, thinly slice the roll, remove the crusts, and, using a small feather,** paint the slices with melted butter. Place on a baking sheet, sprinkle with cheese, and bake.