I don't normally like to mess about with oysters – and this recipe is just as simple as putting a spoonful of shallots in red wine on your oyster.
Six or more rock oysters, shucked, plus some seaweed (optional) for serving
Pour the champagne into a shallow container and place in the freezer about 6 hours before you need it. Give it a stir every so often; it should look a bit like a Slush Puppie.
To serve, place the seaweed on a serving dish with the oysters on top, then spoon a couple of teaspoons of the champagne sherbet on to each oyster.