To defrost the Brisket remove from the freezer and leave on your kitchen worktop for one day. Alternatively, place the Brisket in the fridge and allow it to gently thaw for two days.Before cooking, remove the packaging and allow the joint to dry out and reach room temperature.
Preheat a fan assisted oven to 140C.
Lightly season the brisket joint and place into an ovenproof roasting dish. Add a good glug of wine and a whole pouch of beef stock and cook for a good 4-6 hours, the longer the better. Top up any liquid if needed during this time.