Celebrity chef Raymond Blanc's Brasserie Blanc chain of restaurants have been directed by a court to cease serving an “undercooked” lamb dish which has left two diners with food poisoning.The customers complained of illness after consuming rare lamb's liver at Brasserie Blanc in London's Covent Garden on seperate occasions this summer. A hearing at Westminster Magistate's Court was told that the dish poses “an imminent risk of injury to health”, and was informed that the restaurant had previously ignored an environmental health warning from Westminster Council.The Brasserie Bar Co., of which Mr Blanc is a director, has now removed the liver dish from the menu at all 18 of its Brasserie Blanc restaurants in the UK and has been ordered to pay costs totalling £3, 103. A spokesperson for the restaurant said: “Brasserie Bar Co. has not contested the environmental health officers' enforcement and will no longer serve liver in any of its restaurants. In order to serve liver and comply with Westminster Council, it would need to be overcooked to such an extent that our customers just won't eat it”.