I don't think I've encountered a buffet of such munificence before. 'Help yourself,' said our waitress, 'go as often as you like.' I know this is par for the course in all-you-can-eat Chinese glooperamas, but check this out: Parma ham; grilled goat's cheese with caramelised onions; smoked duck; smoked halibut; fat slabs of rather excellent foie gras. If you're greedy for luxury ingredients, this lunch could be the best deal in town.