Make the bechamel sauce in the microwave.
Put the butter and flour in a heatproof container, and microwave without covering for 1 minute.
Mix the melted butter and flour together while you add 1/2 of the milk gradually. When it's smooth, microwave for 1 minute.
Add the rest of the milk gradually while mixing. When it's smooth again, microwave for another minute.
Season with salt and pepper, and add a little nutmeg if you have it. The bechamel sauce is done.
Put the ham, 1-2 tablespoons of sauce, and cheese on the bread in that order, and toast in a toaster oven.
When the cheese has melted and browned nicely it's done.
I used an English muffin here.
Great as a hot panini sandwich too.
Story Behind this Recipe
I love the croque monsieur served at a French style cafe I frequent. The regular way is to sandwich the filling between two slices of bread and to bake it, but you can enjoy the flavor with a version using just one slice of bread topped with the filling.
-Adjust the amount of time it takes to cook the bechamel sauce depending on your microwave oven. -If you add a little nutmeg to your sauce, it really tastes like the type of thing you can get at a cafe.