Step 1 Preheat the oven to 240 ° C. Step 2 Make the bechamel sauce. Step 3 Place a layer of béchamel, grated cheese, 1/2 slice of ham, bechamel and grated cheese on 1 slice of lightly buttered bread. Close with the second slice of bread and cover the croque-monsieur with béchamel and grated cheese. Step 4 Place the 4 croque-monsieur on the oven plate covered with aluminum foil (be careful not to let them burn in the oven). Bake 15 to 20 minutes. Step 5 Enjoy with green salad. I add my grain of salt