• Béchamel sauce:
• ¼ cup unsalted butter (½ stick)
• ¼ cup all-purpose flour
• 1½ cups whole milk
• salt and freshly ground black pepper
• 1 tablespoon dijon mustard
• dash of ground nutmeg
• Sandwich:
• 8 thin slices white sandwich breads
• 5 ounces good quality ham about 8 slices
• 6 ounces Gruyere cheese ,or Emmental cheese, grated (about 2½ cups)
• 1/4 cup freshly grated parmesan cheese


Lightly toast the bread first.

Béchamel sauce:

Melt butter in a medium saucepan over medium heat. Whisk in flour and cook, stirring constantly, for about 3 minutes. Gradually add milk, stirring well until the mixture is smooth. Cook, stirring, until sauce is thickened.

Season with a little bit of salt and pepper. Remove from heat and whisk in mustard and nutmeg. Set aside while you make the sandwiches, or make the sauce up to 1 week in advance.

Assemble sandwiches:

Preheat oven to 425° F. Line a baking tray with parchement paper and add the bread slices to toast slightly.

Spread each bread slice with a layer of béchamel, spreading it all the way to the edges. Place 4 slices of bread, béchamel side up, on prepared baking sheet.

Top each with a piece of ham, a handful of gruyere, and a sprinkle of parmesan cheese. Place remaining slices of bread on top, béchamel side up, then top with remaining gruyere and parmesan cheese.

Bake at 425 degrees F for about 15 minutes, until cheese is melted, and then turn the oven to broil and broil until the cheese on top is lightly golden about another 2-4 minutes.


Cheese: Emmental cheese is often used for croque monsieur, but I found that hard to find, and I do know Gruyere is commonly used as well, so either will work.
Béchamel: Save on prep time by making the white sauce ahead of time. Make it as instructed, allow it to cool, place plastic wrap directly onto surface, then cover and refrigerate for up to 1 week.

Croque Madame: To make this into a Croque Madame sandwich, make the recipe as instructed, then fry eggs (one for each sandwich, sunny-side up) in a separate skillet while the sandwiches toast in the oven. Place an egg on top each sandwiches.

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