To prepare the lamb:

• 4 lamb shanks
• 3 garlic cloves, sliced into 4 pieces
• 4 sprigs fresh rosemary, sliced into 3 pieces

To cook the lamb shanks:

• 3 tbsp olive oil
• 4 banana shallots, finely chopped
• 3 garlic cloves, finely sliced
• 300ml/11oz red wine
• 2 sprigs fresh rosemary
• 2 sprigs fresh thyme
• 750ml/1 pint 6fl oz chicken stock
• salt and freshly ground black pepper

For the olive oil mash

• 1 kg/2lb 2oz King Edward potatoes, peeled and cut into chunks
• pinch salt
• 75-110ml/3-4fl oz extra virgin olive oil
• salt and freshly ground black pepper
• 200g leeks finely chopped
• 200g Caerphilly cheese grated

1. Preheat the oven to 140C/280F/Gas 1.
2. To prepare the lamb, using a sharp knife, make three small incisions in each of the lamb shanks.
3. Secure together a piece of garlic and rosemary and insert this into one of the incisions in the lamb, pushing in firmly into the pocket.
4. To cook the lamb shanks, heat a frying pan until hot and add one tablespoon of the olive oil to the pan. Add the lamb shanks and fry on each side for one minute until browned all over.
5. Meanwhile, heat a large ovenproof casserole dish until hot and add the remaining olive oil, shallots and garlic.
6. Fry the shallots and garlic for about 2-3 minutes, until just softened, but not browned.
7. Add the red wine and bring to the boil.
8. Add the rosemary, thyme, butter beans and red wine vinegar and return to the boil.
9. Place the lamb shanks into the sauce and cover with the chicken stock. Season with salt and freshly ground black pepper.
10. Bring to a simmer, cover and place in the oven to cook for 3-4 hours, or until the meat is meltingly tender and falling off the bone.
11. For the olive oil mash, place the potatoes into a large saucepan and cover with water. Add a pinch of salt, place on the heat and bring to the boil.
12. Simmer for 10-15 minutes until tender.
13. Add the leek and cook for a further 5 minutes.
14. Drain well and return to the pan over a low heat for a few seconds to remove any excess moisture.
15. Using a potato masher or ricer, mash well, adding the olive oil to slacken and flavour the potatoes. Season with salt and freshly ground black pepper. Add the cheese and mix well.
16. To serve, remove the lamb shanks from the sauce and place onto four serving plates.
17. Whisk the butter into the sauce and stir.
18. Taste to check the seasoning and add a little more salt and freshly ground black pepper if necessary.
19. Spoon the sauce over the lamb shanks and serve with the olive oil mash. Drizzle over a little extra olive oil to finish.

Recipe by Dan Williams, originally featured on Prynhawn Da.