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Croque Monsieur

Take the classic ham and cheese sandwich to the next level with this Croque Monsieur Sandwich recipe!

Author Tracy

Ingredients

  • 2 Tbsp butter
  • 2 Tbsp flour
  • 1 1/2 cups milk
  • A pinch each of salt freshly ground pepper, nutmeg, or more to taste
  • 6 ounces Gruyère cheese grated (about 1 1/2 cups grated)
  • 1/4 cup grated Parmesan cheese packed
  • 8 slices of French or Italian loaf bread
  • 12 ounces ham sliced
  • Dijon mustard

Instructions

  • 1 Preheat oven to 400°F.
  • 2 Make the béchamel sauce. Melt butter in a small saucepan on medium/low heat until it just starts to bubble. Add the flour and cook, stirring until smooth, about 2 minutes. Slowly add the milk, whisking continuously, cooking until thick. Remove from heat. Add the salt, pepper, and nutmeg. Stir in the Parmesan and 1/4 cup of the grated Gruyère. Set aside.
  • 3 Lay out the bread slices on a baking sheet and toast them in the oven, a few minutes each side, until lightly toasted. For extra flavor you can spread some butter on the bread slices before you toast them if you want.
  • (Alternatively, you can assemble the sandwiches as follows in step four and grill them on a skillet, finishing them in the broiler with the bechamel sauce.)
  • 4 Lightly brush half of the toasted slices with mustard. Add the ham slices and about 1 cup of the remaining Gruyère cheese. Top with the other toasted bread slices.
  • 5 Spoon on the béchamel sauce to the tops of the sandwiches. Sprinkle with the remaining Gruyère cheese. Place on a broiling pan. Bake in the oven for 5 minutes, then turn on the broiler and broil for an additional 3 to 5 minutes, until the cheese topping is bubbly and lightly browned.