First he ate stewed eels (£2.20), then turned his attentions to pie, mash and parsley liquor (£1.95) and a mug of tea (65p). The 46-year-old, whose restaurant boasts a 30-course "tasting menu", is promoting his new book, A Day At elBulli. Last night he addressed 1,000 foodies at the Southbank Centre.