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Close-up of a golden-brown Leek Gratin baked in a rectangular dish, ready to serve.

Leek Gratin


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Description

A creamy and savory leek gratin, perfect as a side dish.


Ingredients

  • 2 lbs leeks, white and light green parts only, sliced
  • 2 tablespoons butter
  • 2 tablespoons all-purpose flour
  • 1 1/2 cups milk
  • 1/2 cup heavy cream
  • 1/4 teaspoon nutmeg
  • Salt to taste
  • Black pepper to taste
  • 1 cup grated Gruyere cheese
  • 1/2 cup grated Parmesan cheese
  • 1/4 cup breadcrumbs


Instructions

  1. Preheat your oven to 375°F (190°C).
  2. Wash the sliced leeks thoroughly to remove any grit.
  3. In a large skillet, melt the butter over medium heat. Add the leeks and cook until softened, about 8-10 minutes.
  4. Sprinkle the flour over the leeks and stir for 1 minute.
  5. Gradually whisk in the milk and heavy cream until smooth.
  6. Bring the mixture to a simmer, stirring constantly, until it thickens.
  7. Stir in the nutmeg, salt, and pepper.
  8. Remove from heat and stir in 3/4 cup of the Gruyere cheese and all of the Parmesan cheese.
  9. Pour the leek mixture into a greased 8×8 inch baking dish.
  10. In a small bowl, combine the remaining 1/4 cup Gruyere cheese and the breadcrumbs. Sprinkle this mixture evenly over the leeks.
  11. Bake for 25-30 minutes, or until the top is golden brown and bubbly.
  12. Let it rest for 5 minutes before serving.

Notes

  • For a richer flavor, you can use half-and-half instead of milk and cream.
  • If you don’t have Gruyere, Swiss or Emmental cheese can be substituted.
  • Ensure leeks are very clean; sand can hide in the layers.
  • Prep Time: 20 min
  • Cook Time: 30 min
  • Category: Side Dish
  • Method: Baking
  • Cuisine: French