Tramezzini steals mother-in-law

Preparation:

Preparation: Turn on the oven at 200 degrees. Meanwhile, prepare the béchamel. When the béchamel is cooked, add the chopped mushrooms (previously soaked in hot water) to it. Jumbled up. Take a slice of bread, spread a little béchamel with the mushrooms on the slice; Once the béchamel and the slices of bread have been used up, put a few pieces of walnut kernels on each slice of bread covered with the béchamel. Once the walnuts have been used up, put the slices in the oven and let them brown. Serve them hot.