This recipe disproves the saying that there can be too much of a good thing. A Croque Monsieur is essentially a grilled cheese that’s stuffed with creamy béchamel sauce and topped with melted cheese. Here, you’ll take it up a notch with crispy bacon and rings of red onion to balance the richness (plus, they just look cool, too). Pair these sandwiches with peppery greens tossed with a bracing mustard vinaigrette to round out the meal, or do as the French do and turn it into a Croque Madame by topping this decadent sandwich with a fried egg.

Dawn Perry

Gallery

Credit: Victor Protasio

Recipe Summary

hands-on:
30 mins
total:
30 mins
Yield:
Serves 4
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Ingredients

Ingredient Checklist

Directions

Instructions Checklist
  • Preheat oven to 400°F. Arrange bacon in a single layer on a foil-lined rimmed baking sheet. Bake until crisp, 15 to 20 minutes, depending on thickness. Drain on a paper-towel-lined plate.

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  • Meanwhile, melt butter in a medium pot over medium. Whisk in flour and cook, whisking constantly, until slightly darkened, 1 to 2 minutes. Gradually whisk in milk and bring to a simmer. Cook, whisking often, until mixture is smooth and slightly thickened, 1 to 2 minutes. Remove from heat and whisk in mustard, salt, pepper, and half the cheese.

  • Arrange 4 slices bread on a rimmed baking sheet. Spread with half the cheese sauce. Top with bacon and remaining bread. Spread remaining cheese sauce over sandwiches. Top with a few onion rings and dust with remaining cheese.

  • Bake until bubbly, 10 to 12 minutes. Increase oven to broil. Broil until golden brown, 1 to 2 minutes. Let cool slightly before serving.

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