2. Assembling:
Place the open oysters in the shell on a plate. Pour a dash of champagne sauce on each oyster.
3. Gratin:
Sprinkle some hat and grated gruyere.
4. Cooking:
Bake at 200°C for 5 minutes, just to grate.
5. Service :
Accompany your toast and champagne
Total time: 25 minutes | Servings: 6 people