"This is one of my favourite ways to cook seafood," says Walton. "The secret to a great clambake lies in the quality of the seafood and the company you share it with." A traditional clambake is cooked in a firepit lined with sea stones and seaweed, although Walton cooks his in a coal barbecue. You can also place a heatproof bowl filled with water in a hot kettle barbecue, place the barbecue rack on top and then place the seafood bundles on the rack. Cover and cook until the clams open (12-15 minutes). Potatoes roasted among the hot coals make the perfect accompaniment to this dish. Choose small potatoes, wrap them individually in foil and place them in the coals when you add the sea stones.