Preheat a convection oven to 75º C (165° F).
In a heavy-bottomed frying pan over a low heat, very gently brown the bird all over in foaming butter. Approx 5 minutes or until golden.
Sprinkle the bird with the game seasoning.
Place the pheasant in the roasting bag, and the bag onto the roasting tin.
Add the water, reduced port and the sprig of thyme.
Seal the bag with the tie.
Cook the hen pheasant ( approx 700g (~1 ½lb) ) for 3 hours at 75ºC/165° F. Allow 4 hours for a 1kg (2.2 lb) cock pheasant.
Remove the tie and strain any juices through a fine chinoise or muslin-lined sieve. You should have around 130ml (1/2 cup).
Reduce the cooking juices by half to leave a perfect jus for the bird.
Remove the meat from the bird and decorate with roast winter vegetables.
Pour over the jus and serve immediately.
Enjoy!