Put the meat in a large pot and cover with cold water, add a generous helping of salt and two bay leaves.
Slowly bring to the boil and simmer for 1 - 2 hours.
You may need to top the water up if it gets far below the meat.
Occasionally remove the scum with a metal spoon.
Never let it boil so the scum doesn’t get a chance to boil back into the stock.
When the meat is soft remove it to a dish.
While it is cooling prepare the vegetables.
When the meat is cold enough to handle shred it into bitesize pieces, getting rid of any gristle.
It is easier to do this when the meat is still warm.
Put the tougher vegetables into the pot with the lamb broth (carrots, cabbage) and simmer for 20 minutes.
Now add the peas, lettuce and spring onions and cook for another 10 minutes.
Check for seasoning and finish with the chopped herbs.