REMEMBER when Jamie Oliver was the Naked Chef rather than a national treasure? You have to cast your mind back more than 20 years to when the cheeky chappy chef with a mop of messy hair and a moped burst on to our TV screens. It was the height of Brit pop and Jamie was to became as super famous as many of the rock and pop stars of the time. I remember meeting him at The Grange Hotel in York, where we conducted an interview in a very formal sitting room about his new - and first - cookbook, The Naked Chef. His first cookery TV show was also on the telly.