Once boiling, turn the heat down to very low, cover loosely with a lid (so some steam can still escape) and let it cook for an hour then test the meat. If using braising beef, an hour should be enough. If using stewing beef, you may need to cook it initially between 90 minutes and 2 hours. Test the meat to see if you can pull strands off a chunk. If so, it is ready to move on to the next phase. (The meat should no longer be really tough and should be almost edible – there is more cooking to come so it doesn’t need to be fully tender yet.)