Oysters are always a great treat but even better when you don't have to shuck them yourself. While cooking on the barbecue, their shells open a little way - just enough to easily remove them.

1 large ripe tomato

1 teaspoon coriander seeds

1 teaspoon chopped garlic

1 tablespoon red wine vinegar

2 tablespoons olive oil

Salt and freshly ground pepper

24 oysters

Preheat grill to high. Combine all of the ingredients except oysters and process with a hand blender or mini chop.

Place oysters on grill, close lid and grill for 4 to 5 minutes or until shells open. Remove shells and drizzle with vinaigrette. Serves 6 to 8.