Soak the meat in a large bowl full of water. Set aside for about an hour. This will bring it to room temperature and the meat will leave out blood and tiny bones, if any.
Rinse the meat and place it all in a large pot or preferrably in a pressure cooker. Do not add anything else.
Cook over low to medium heat; until the meat first leaves and then absorbs back most of its own water. It will take around half an hour. The lid must be kept closed.
If you are using a pressure cooker close the lid and cook the meat until the lamb shanks are well done and almost parting from their bones.
If you are using a normal pot, again cook as stated, just more time will be needed.
When the lamb shanks are cooked enough, spread generously the sauce all around and place them in an oven tray or dish. Cook in a pre-heated oven at 175°Celcius for about 30 minutes.