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Croque Monsieur Casserole

A warm and comforting dish that transforms the classic Croque Monsieur sandwich into a delicious casserole filled with layers of ham, cheese, and creamy béchamel sauce.
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Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings: 6 servings
Course: Main Course
Cuisine: French
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

Main
  • 8 slices of bread preferably sourdough or French bread
  • 8 ounces of sliced ham
  • 1 ½ cups of shredded Gruyere cheese
  • 1 ½ cups of milk
  • 4 tablespoons of unsalted butter
  • 4 tablespoons of all-purpose flour
  • 2 large eggs
  • 1 teaspoon of Dijon mustard
  • Salt and pepper to taste

Equipment

  • Large baking dish (9x13 inches)
  • Medium saucepan
  • Whisk
  • Mixing bowl
  • Sharp knife
  • Measuring cups and spoons

Method
 

  1. Preheat your oven to 350°F (175°C).
  2. In a medium saucepan, melt the butter over medium heat.
  3. Stir in the flour and cook for about 2 minutes to form a roux.
  4. Gradually whisk in the milk, ensuring there are no lumps, and continue to cook and stir until the sauce thickens and bubbles, about 5-7 minutes.
  5. Add the Dijon mustard, salt, and pepper to the béchamel sauce.
  6. In a mixing bowl, whisk the eggs until smooth and incorporate the béchamel sauce into the eggs.
  7. In your baking dish, layer four slices of bread at the bottom.
  8. Top with half of the ham and half of the cheese, followed by half of the béchamel mixture.
  9. Add the remaining bread, ham, and cheese, then pour the rest of the béchamel sauce on top.
  10. Place the casserole in the preheated oven and bake for 30-40 minutes until golden brown and bubbly.
  11. Let it cool slightly before serving.

Notes

For an extra crispy top, broil the casserole for a few minutes at the end of baking.