Jamie Oliver's back - and this time he's preparing a festive feast with help from his friend and mentor Gennaro Contaldo, and Brian the gardener. In an hour-long special, Jamie is also joined by free range turkey farmer Paul Kelly, and free range goose doyenne Judy Goodman. AdvertisementThey discuss how to choose the best and most succulent bird for your Christmas dinner and Jamie shows how to cook up two fantastic Christmas birds with his best stuffing and gravy. His garden may be winding down for winter, but Jamie takes a wander to see what is on offer. He finds the garden still abundant with greens and he shows how to make the best out of them with a delicious flavoured butter If anyone is in any doubt how to make the perfect roast potato, Jamie shows the foolproof way to make this essential addition to the Christmas table work every time. Finally, while Gennaro prepares some seasonal roast chestnuts in his own style, Jamie rounds off the day with his twist on the classic mince pie.