Bollito Misto

• 2 celery sticks, cut into short lengths
• 2 carrots, roughly chopped
• 1 onion, roughly chopped

Put the celery, carrots and onion in a very large saucepan or flameproof casserole with enough water to cover the meat and chicken when they are put in. Bring to the boil, then put in the piece of brisket. Return the water to the boil and skim off any scum that comes to the top. Add a little salt, put the lid on so that it almost covers the pan, and turn the heat down so that the water just sim