Step 1 Start by opening your croissants in half with a knife without separating them completely. Step 2 Preparation of the bechamel: Step 3 Melt the butter in a saucepan, add flour and gradually stirring with the whisk add milk (quantities are to your liking). Leave to thicken over low heat, stirring constantly. Add salt, pepper and nutmeg. Step 4 Once your béchamel is ready, melt some cheese and spread it inside the croissants. Add a slice of rolled ham, then béchamel and grated cheese. Step 5 Repeat this for the other 3. Step 6 Put in the oven at 180 ° C (thermostat 6) for 20 min while monitoring. Author's note Treat yourself and have a good meal! To be enjoyed as an appetizer (before a light dish) or as a dish with a green salad.