Croque Monsieur
Ingredients
For The Bechame Sauce
4 Tbsp. salted butter
1/4 cup all-purpose flour
1/4 tsp. kosher salt, plus more to taste
1/4 tsp. ground black pepper, plus more for sprinkling
Pinch ground nutmeg
2 cups warm milk
For The Sandwiches
6 Tbsp. salted butter, at room temperature
12 slices hearty white sandwich bread
2 Tbsp. dijon mustard
3/4 lb. ham, sliced (at least 12 slices)
1 lb. gruyère cheese, shredded and divided
1 Tbsp. chopped fresh chives, for sprinkling
Directions
Preheat the oven to 375°F .
For the béchamel sauce: In a medium saucepan,
heat the butter over medium heat until melted
and the foaming subsides. (Do not let it
brown.) Whisk in the flour, salt, pepper, and
nutmeg until well combined. Cook, whisking
constantly, until the raw flour smell disappears,
1 to 2 minutes. Slowly stream in the warm milk,
whisking constantly until no lumps remain.
Continue whisking over medium heat and
occasionally scraping the bottom and sides of
the saucepan with a rubber spatula until the
sauce thickens to a pudding-like texture, 4 to 5
minutes. Pour the sauce into a medium bowl
and place a piece of plastic wrap directly on the
surface so it does not form a skin
3
For the sandwiches: Evenly spread about 1/2
tablespoon of butter on 1 side of each slice of
bread. Place 6 slices, butter-side down, on a
rimmed baking sheet. Evenly spread about 1
teaspoon of dijon mustard on each slice of bread
on the baking sheet. Place 2 folded slices of ham
on top of the mustard. Sprinkle the ham with
about ½ cup (2 ounces) of the cheese. Spread
about 1 tablespoon of béchamel sauce on the
unbuttered side of the remaining 6 slices of
bread. Place the bread, béchamel-side down, on
top of the cheese.
Bake the sandwiches on the center rack of the
oven until the bread is lightly golden and the
cheese is starting to melt, 6 to 8 minutes.
Remove the baking sheet from the oven and
carefully flip the sandwiches. Bake the other
side until lightly golden, about 6 minutes.
Remove the baking sheet and increase the oven
temperature to broil.
Spoon about 3 tablespoons of béchamel sauce
on each of the sandwiches, spreading to
completely cover the top slice of bread. Sprinkle
about 2 tablespoons (½ ounce) of the remaining
cheese on each sandwich, topping the béchamel.
Broil the sandwiches on the center rack of the
oven, watching carefully and rotating the baking
sheet as needed, until the cheese is bubbling
and beginning to brown, 1 to 4 minutes.
Sprinkle the sandwiches with fresh chives and
pepper, and serve hot.
Tip: Warming the milk before adding it to the sauce will help reduce the
amount of lumps, which means less whisking and less stress!