Description: Oyster & Leek Gratin is a rich and comforting coastal Irish dish that combines fresh oysters with tender leeks in a creamy sauce, finished with a golden breadcrumb topping. Popular in areas where oysters are plentiful, this gratin showcases the natural brininess of the shellfish while the leeks add sweetness and depth. It makes an elegant starter or a satisfying light supper served with crusty bread.
Ingredients
- 18 fresh oysters, shucked
- 2 large leeks, thinly sliced
- 2 tablespoons butter
- 1 tablespoon all-purpose flour
- 1 cup whole milk
- ½ cup heavy cream
- ½ teaspoon sea salt
- ¼ teaspoon black pepper
- ½ cup fresh breadcrumbs
- 2 tablespoons grated Irish cheddar cheese
- 1 tablespoon chopped parsley
Instructions
- Preheat the oven to 400°F (200°C).
- Melt the butter in a saucepan over medium heat.
- Add the sliced leeks and cook gently for 8–10 minutes until softened.
- Sprinkle in the flour and stir for 1 minute.
- Gradually whisk in the milk and cream until smooth.
- Season with salt and pepper and simmer for 3–4 minutes until slightly thickened.
- Arrange the oysters in a buttered baking dish.
- Spoon the leek sauce evenly over the oysters.
- Combine the breadcrumbs, cheddar, and parsley in a small bowl.
- Sprinkle the breadcrumb mixture over the top.
- Bake for 15–18 minutes until golden brown and bubbling.
- Allow to rest for a few minutes before serving.
Cooking Tips
- Fresh oysters provide the best flavor and texture.
- Wash leeks thoroughly to remove any grit hidden between the layers.
- For extra richness, add a splash of white wine to the sauce.
- Do not overcook the oysters, as they can become tough.
Serving Suggestions
Serve this Oyster & Leek Gratin with crusty Irish brown bread, a simple green salad, or roasted vegetables. It pairs wonderfully with a crisp white wine and makes an impressive starter for a seafood-focused meal.
