1. Preheat the grill
2. Arrange the oysters in the bottom half of the shells and place on a baking sheet.
3. Melt the butter in a small pan and add the shallot and cook until soft.
4. Stir in the chervil, cream and seasoning to taste.
5. Place a spoonful of the sauce on top of each oyster and sprinkle with the cheese and breadcrumbs.
6. Grill until golden brown.
Serve with a watercress salad and crusty bread.