In Ever Wondered about... ? Alan Coxon prepares a roast with a twist and Kathy Sykes has tips on temperature, while Darina Allen of Ireland's Ballymaloe Cooking School joins Gregg Wallace to prepare potato soup, mackerel and perfect pastry. Plus, at 10.10, a picnic on Southend pier with Jamie Oliver in The Naked Chef, followed, at 10.50, by Rick Stein 's Seafood Odyssey.