Greengrocers Gregg Wallace and Charlie Hicks sample fruit and vegetables from around the world and take calls on how to grow, buy, cook and eat them. Producer Dixi Stewart. LINES OPEN from 1.30pm. PHONE: [number removed]. E-MAIL: vegtalk@bbc.co.uk. WRITE TO: Veg Talk, Room 6113, BBC Broadcasting House. London. W1A 1AA