Pre-heat the oven to 220 C/425 F/Gas Mark 7. Put the brisket in the oven naked in a roasting tin. Roast for 20 minutes before removing, turning down the oven to 110 C and leaving the oven door open for 30 seconds or so until the temperature drops. I then cover the tray and brisket completely with silver foil. Roast for 9 hours or until super soft when you insert a fork. I quite often leave it cooking overnight. I put it in just before I go to bed and then out first thing.
If using the slow cooker after the initial browning in the oven simply put in the slow cooker and cook on low for 9 hours or until soft enough to shred.
I remove the beef and set aside covered in foil for at least 30 minutes. I tip the meat juices into a saucepan and bring to the boil. I mix the 1 tbsp cornflour with 3 tbsps of cold water and add to the juices whilst whisking. Simmer then gently for a few mins. Repeat if it does not thicken enough. If there isn't enough gravy then add some good beef stock. Set aside.
Using two forks shred the beef in the roasting tray and then pour the gravy back over and ensure that all the meat gets a good coating. if it is cool enough to handle I sometimes use my hands to pull it into shreds.
I cover it well if I am not serving it immediately and can often keep in the fridge for several days. You simply just reheat it covered with foil in the oven. I use baking paper crushed up in your hand and dunked under the tap. It makes it go soft and easy to use. I tuck that on top of all the meat in a snug fit before covering the tray with silver foil. I reheat it at 180 C for about fifteen mins.
Apply to Face and let the gravy drip off your chin