Preparation:

• Cut the lamb into bite-sized cubes and dust with the flour.
• Working in 3 batches, heat the butter in a large, heavy-based casserole (use one with a lid) over a medium-high heat and sear the meat all over until it is browned and has a roasted aroma. Remove with a slotted spoon and set aside until all the meat is browned.
• Turn the heat down to medium, then add the onions and garlic to the casserole and cook, stirring until the onion is translucent but not browned, about 5 minutes.
• Add the lamb stock and red wine, using a wooden spoon to scrape the base of the casserole and release the browned bits from the base. 
• Add the tomato purée and cook, stirring, for a further 2–3 minutes.
• Add the bay leaves, rosemary sprigs and juniper berries. Return the meat (along with the meat juices) to the casserole, bring to the boil, then turn the heat to low and simmer gently for 1 hour, partially covered with the lid.
• Add the carrots, celery and diced potatoes and simmer for a further 1 hour, covered.
• Add the peas and simmer for 10 minutes.
• Garnish with the parsley and serve.

Tip:

If you have separated the meat from a leg of lamb, you can make your own lamb stock from the leftover bone.