Jul 14 2026
RestaurantsPetterinosCroque Monsieur Recipe

Croque Monsieur Recipe

Inspired by Petterinos
Time45m
Serves4

Artisanal Smoked Ham Gruyere Cheese Mornay Sauce Hand Cut Truffle Parmesan French Fries

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Ingredients

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Croque Monsieur

Truffle Parmesan French Fries

Method

Croque Monsieur

  1. 1

    Prepare the Mornay Sauce

    Melt the butter in a saucepan over medium heat. Stir in the flour and cook for about 1 minute until you form a roux.

  2. 2

    Make the Sauce

    Gradually whisk in the milk, ensuring no lumps form. Continue to cook, stirring constantly, until the sauce thickens and coats the back of a spoon.

  3. 3

    Season the Sauce

    Add salt, black pepper, and a pinch of nutmeg to the sauce. Remove from heat and stir in half of the Gruyere cheese until melted and smooth.

  4. 4

    Assemble the Sandwich

    On a baking sheet, lay out 4 slices of sourdough bread. Top each with a slice of ham, a generous portion of Mornay sauce, and then sprinkle with more Gruyere cheese. Place the other 4 slices of bread on top.

  5. 5

    Cook the Sandwich

    Butter the top of each sandwich. Broil in the oven for about 3-5 minutes until golden brown. Flip the sandwiches, butter the other side, and broil again until crispy and cheese is bubbling.

Truffle Parmesan French Fries

  1. 6

    Prepare the Potatoes

    Peel and cut the Russet potatoes into thin strips to resemble fries.

  2. 7

    Fry the Potatoes

    Heat oil in a deep fryer or large pot. Fry the potato strips in batches until golden brown and crispy, about 5-7 minutes. Remove and drain on paper towels.

  3. 8

    Season the Fries

    While still hot, drizzle truffle oil over the fries and toss with salt, black pepper, and grated Parmesan cheese.

  4. 9

    Finish with Parsley

    Garnish the fries with fresh parsley before serving.

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