1. Sausage, cheese, potatoes RUB on a large grater. Add the onion (finely chopped), egg, mayonnaise. Mix everything until smooth.

2.Baton cut into serving pieces and brush with ketchup. The mass is spread on the loaf. Sandwiches put on a sheet, greased with butter and bake in a preheated oven at 180 degrees for about 15-20 min.