Soak the ham hocks, or ham or bacon joint in water to cover overnight to remove the excess salt.
The next day, drain the meat and rinse in cold water, then put into a large saucepan with the onions, carrots, bay leaf, cloves, thyme sprigs and black peppercorns. Cover with cold water and bring to the boil, then immediately lower the heat and simmer for 3 hours.<