Equipment
Ingredients
Seafood
- 250 g shucked fresh oysters
- 120 ml oyster liquor
Soup Base
- 45 g unsalted butter
- 150 g leeks, white and light green parts only, thinly sliced and washed thoroughly
- 300 g waxy potatoes, peeled and cut into 1cm dice
- 300 ml whole milk
- 200 ml heavy cream
- 1 g nutmeg, freshly grated
- 3 g kosher salt
- 1 g white pepper, finely ground
Cheese Croutons
- 100 g baguette, cut into 2cm cubes
- 30 g unsalted butter, melted
- 60 g gruyere cheese, finely grated
Nutrition (per serving)
Method
Strain the reserved oyster liquor through a fine mesh strainer into a small bowl to remove any shell fragments or sand. Set aside.
Melt the butter in a heavy-bottomed pot over medium-low heat. Add the sliced leeks and gently sweat them until thoroughly softened and translucent, ensuring they do not take on any brown color, about 8 minutes.
Add the diced potatoes, strained oyster liquor, and whole milk to the pot. Bring to a gentle simmer. Cook until the potatoes are completely tender when pierced with a knife, about 12 minutes. Do not let the mixture boil vigorously.
Preheat your oven to 200°C/400°F. Toss the baguette cubes with melted butter and arrange in a single layer on a baking sheet. Top each cube generously with grated gruyere cheese. Bake until golden and the cheese is melted and bubbling, about 8 minutes.
Once the potatoes are tender, stir the heavy cream, freshly grated nutmeg, kosher salt, and white pepper into the soup base. Keep the heat on medium-low until it begins to steam gently.
Carefully slide the shucked oysters into the steaming liquid. Poach gently until the edges of the oysters begin to curl and they plump up, about 3 minutes. For food safety, ensure the oysters reach an internal temperature of 63°C/145°F before serving. Immediately remove the pot from the heat.
Ladle the hot stew into warmed shallow bowls, ensuring an even distribution of oysters, potatoes, and leeks. Float the hot cheese croutons on top of each bowl just before serving.
Chef's Notes
- Sweating the leeks properly is crucial. A rush job will leave you with crunchy, oniony bites rather than the sweet, mellow backbone this dish requires.
- Waxy potatoes like Yukon Golds hold their shape beautifully in stews. Avoid starchy varieties like Russets, which will disintegrate and turn the elegant broth sludgy.
- Freshly grated nutmeg contains volatile oils that vanish quickly once ground. Grating it directly into the pot at the end of cooking preserves its warm, floral aroma.
- For absolute clarity in your oyster liquor, line your fine mesh strainer with a piece of damp cheesecloth to catch even the finest particles of sand.
Storage
Refrigerator: 2 days — Store in an airtight container. The flavor deepens on the second day.
Reheating: Warm very gently over low heat until steaming. Do not boil, or the dairy will curdle and oysters will become rubbery.
