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A Croque Monsieur sandwich cut in half and topped with white sauce.

Gluten Free Croque Monsieur

Croque Monsieur is a famous French sandwich that is a grilled ham and Swiss cheese on steroids. If you ever thought of disguising some leftover slices of bread, this is the perfect recipe.
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Course: brunch
Cuisine: French
Keyword: gluten free croque monsieur
Prep Time: 5 minutes
Servings: 4 sandwiches
Author: Cinde Little

Ingredients

WHITE SAUCE

  • 2 tablespoon butter
  • 1 tablespoon cornstarch increase to 1½ tablespoon if it isn't as thick as you like
  • ¼ teaspoon salt
  • teaspoon pepper
  • 1 cup milk (1% or higher)

SANDWICHES

  • 8 slices gluten free white bread (or any sandwich bread)
  • butter for both sides of bread
  • 4 slices ham
  • Dijon mustard
  • sliced Swiss cheese (Gruyere or Emmenthal)

FINISHING

  • ½ cup grated Swiss or Parmesan cheese

Instructions

MAKE WHITE SAUCE

  • Melt butter in small saucepan.
  • Add cornstarch, salt and pepper, whisk until smooth. Stir occasionally until bubbly.
  • Slowly pour in a third of the milk. Stir occasionally as it thickens.
  • Add the next third and allow sauce to thicken again.
  • Add the final third, stirring until sauce is thick and smooth.

MAKE SANDWICHES

  • Set bread on a board to make 4 sandwiches. Butter outside of all bread slices.
  • Spread one side of each sandwich with Dijon mustard and cover with ham.
  • Cover ham with single layer of sliced cheese. Close sandwiches.
  • Preheat griddle or non-stick frying pan. Grill sandwiches on both sides until golden and cheese is melted.

FINAL ASSEMBLY

  • Preheat broiler and place sandwiches on lined baking sheet.
  • Spread warm white sauce on top of each sandwich and sprinkle with shredded cheese.
  • Broil until top is brown and bubbly. Serve immediately.

Notes

NOTE - You can over stir a sauce with cornstarch and break it. To avoid this simply stir off and on to preventing it from sticking to the bottom.
I cut the sandwiches as soon as they're grilled then place the whole sandwich on a baking sheet. This makes it easier to prop one piece against the other for serving.