For top mountaineers, it might be the north ridge of K2; for whitewater rafters, it is the Zambezi. But for those who want to find out whether they have what it takes in the Italian cuisine stakes, who reckon they know their polenta from their bruschetta, a week as a chef in the kitchens of the River Cafe in Hammersmith has to be the ultimate testing ground - as the winner of our River Cafe competition, Bridget Herbert, thirtysomething mother of two, and sometime feng-shui consultant, discovered last week.