01 -
Preheat oven to 230°C. Spread a thick layer of rock salt or coarse salt on a large baking sheet to stabilize the oyster shells during baking.
02 -
If shucking oysters by hand, scrub shells thoroughly and shuck carefully, preserving the oysters on the deeper shell halves. Arrange the prepared oysters on the salted baking sheet.
03 -
Melt 2 tablespoons butter in a large skillet over medium heat. Add minced shallots and sauté until fragrant and translucent, approximately 2 minutes. Add spinach and cook until just wilted, 1–2 minutes. Remove from heat and allow to cool; ensure mixture remains dry.
04 -
In a food processor, combine cooled spinach mixture, remaining 2 tablespoons softened butter, chopped parsley, chives, tarragon, breadcrumbs, lemon juice, salt, and black pepper. Pulse until finely chopped and evenly mixed, maintaining a coarse texture.
05 -
Spoon about 1 tablespoon of the herbed filling over each oyster, pressing gently to secure in the shell.
06 -
Bake in the hot oven for 10–12 minutes, or until the topping is golden brown and bubbling. Begin monitoring after 8 minutes, as oysters cook rapidly.
07 -
Transfer oysters to a serving platter and present while still steaming and aromatic.