Fry in half butter mushrooms and onions. When roasting sprinkle mushroom cube instead of salt. On the other half of oil fry the flour. Add flour to mushrooms and onions, stir. Boil the milk. Stirring constantly, pour hot milk into mushroom mixture. Stir constantly to avoid lumps. Should get a thick sauce. Put it to cool. Sauce I usually cook it the day before.

To the chicken mince, if desired, add ground onion and divide into patties. With wet hands make mincemeat "pies" and put into the milk sauce. After cooling, it is quite elastic.

Sidepipes give the cutlet shape and fry like a regular hamburger. In the process of roasting the sauce in a little bit melts and seeps into the cake.