Instructions
1. Preheat the oven to 160°C (315°F).
2. Heat the oil in a flameproof, heavy-based casserole dish over high heat.
3. Cook the lamb, skin side down, for 5 minutes, or until the fat is golden brown. Turn over and cook for another 5 minutes.
4. Strew the onion, garlic, rosemary and bay leaf over the lamb, then season well with sea salt and freshly ground black pepper. Use a large spoon or tongs to push the ingredients around in the pan, so the onion starts to sizzle in the oil. Cook for 5 minutes, or until the onion smells sweet and just starts to colour.
5. Add the stout, vinegar, stock and sugar. Give the pan a shake to loosen any bits that are stuck. Turn the lamb over a couple of times so the ingredients are well combined.
6. Cover with a tight-fitting lid, then transfer to the oven and bake for 2½-3 hours, or until the lamb easily pulls away from the bone.
7. Remove from the oven, leave to rest for a while, then serve with steamed greens.
Open a bottle of your favourite red and enjoy!