A really, really easy to prepare, but impressive looking dish; great for summer entertaining! Adapted from the Australian Womens' Weekly Dinner Party series of cookbooks; this was from Cookbook No. 2. The original recipe included crab and mussels; along with 3 recipes for sauces - Chilli Cocktail, Lemon Tartare and Louis. For ease of preparation, I substitute additional oysters, prawns and salmon for the crab and mussel; and use bought Thousand Island and Tartare Sauce. To make this a really Australian dish, use Tasmanian oysters and salmon; and Australian-caught lobsters and prawns. Can be prepared a few hours ahead and refrigerated until ready to serve.