Croque monsieur with bechamel sauce

– Preheat the oven to 180 °C.
– On two slices of bread, put on each a little cooled bechamel, grated Gruyère, a slice of ham and a little more béchamel.
– Cover with a slice of bread and press very lightly.
– Add a little more béchamel and grated Guyère.