Ingredients
2 tbsp olive oil, plus extra for brushing
25g/1oz butter
800g/1lb 12oz lamb shoulder, chopped into bite-sized pieces
1 heaped tbsp flour, seasoned with salt and freshly ground black pepper
1 onion, chopped
2 leeks, finely sliced
2 garlic cloves, chopped
2 bushy sprigs fresh rosemary
150ml/5fl oz red wine
150ml/5fl oz lamb stock
200g/7oz Stornoway black pudding, skin removed, thinly sliced (chill well before slicing)

Method
1. Preheat the oven to 160C/325F/Gas 3.
2. Heat one tablespoon of olive oil with the butter in an ovenproof casserole until hot.
3. Place the lamb into a large bowl, sprinkle over the seasoned flour and mix well. Tip half of the lamb pieces into the casserole and cook, stirring frequently, until browned all over. Remove with a slotted spoon to a plate and repeat with the remaining meat, then remove the second batch of meat to a plate.
4. Add another tablespoon of oil to the casserole and gently fry the onion, leeks and garlic until softened.
5. Return the meat to the casserole along with the rosemary, wine and stock. Bring to the boil, then cover with a lid and transfer to the oven. Cook for about an hour, stirring once halfway through the cooking time.
6. Remove the casserole from the oven and discard the rosemary sprigs. Increase the oven temperature to 190C/375F/Gas 5.
7. Place the black pudding slices on top of the stew, overlapping slightly. Brush the slices with a little olive oil, then return to the oven and cook, uncovered, for about 30 minutes, or until the stew is bubbling and the topping is crisp.
8. Serve at once with Rumbledethumps and a green vegetable.