Note: This works too with roasting meats. For a joint of pork, for example, surround the meat with some sage leaves, which go very well with pork or white meats.
Remarks
This recipe is warmly dedicated to Frances Maguire, from Dublin, who kindly taught me everything about cooking in a bag.
How can such a low cooking temperature produce such soft meat? To understand that you need some molecular gastronomy. Please note that you can apply this slow cooking to many other foods.
If you have a really big bird, like a capon or turkey, you can easily go beyond 6 hours.
Vegetables cooked long and slow in the poultry juices, become deliciously moist and flavoursome ...
If your bird is so big that you have left-overs, you can make an "Express Parmentier" with it by covering a layer of meat with mashed potato and grated cheese (10 minutes under the grill), and it's very good!