1 kg/2lb 4oz peeled, cooked floury potatoes (such as King Edward, Desiree or Maris piper)
Butter (lactose free), to taste
dash of lactose free milk
salt and pepper
Serves - 4
Preheat the oven to 180C/350F/Gas 4. Scrape all the meat off the lamb bone and put through a mincer with the carrot, celery and parsley.
If you haven’t got a mincer then chop everything finely and mix together. the ketchup.
Press the mixture into an ovenproof dish. Mash together the cooked potatoes with lactose free butter to taste and a dash of lactose free milk, and top the meat with the potatoes. Use a fork to make a pretty design on top.
Cover the dish with foil and cook in the oven for 30 minutes.
Then remove the foil and turn up the oven to 200C/400F/Gas 6 for a final 10 minutes so it’s piping hot and lightly golden-brown on top.