Put the butter, sage and salt in a pan and put it on a low fire until the butter melts. Do not brown the butter or the sauce will taste burnt.

Cook the chestnut gnocchi as per the instructions that you find here but use the chicken stock instead of water.

When the gnocchi are cooked, remove them with a slotted spoon and put them in the pan with the butter and sage sauce. Mix well on low fire for a minute or two, then take a serving dish and put a layer of gnocchi at the bottom. Add some sliced cheese, some Parmigiano Reggiano and ground pepper, then put another layer of gnocchi and so on until you run out of gnocchi.