Pore ​​with porcini mushrooms

For 4 people:

800 g porcini
1 onion
40 g butter
250 g bechamel
2 eggs
50 g Parmesan cheese.

Chop the onion, slice the porcini mushrooms and cook in butter for 10 minutes, then add them to the béchamel sauce, 2 egg yolks, Parmesan cheese and 2 egg whites.

Pour into a buttered mold and bake at 180° for 40 minutes.