
Preheat the oven to 180°C (160°C fan). Slice the top off the garlic bulb to expose the cloves, drizzle with olive oil, wrap in foil, and roast for 25-30 minutes until soft and caramelised. Once cooled slightly, squeeze the cloves out of their skins and mash into the Greek yoghurt. Stir in lemon juice and season to taste with salt and pepper. Set aside.
Pat the lamb rumps dry and season generously with salt and pepper. In a small bowl, combine chopped rosemary, parsley, thyme, and crushed garlic. Brush the lamb lightly with olive oil, then press the herb mixture onto all sides so it forms a crust.
Heat a large ovenproof frying pan over medium-high heat. Add a little olive oil if needed, then sear the lamb for 2-3 minutes per side until browned. Transfer the pan to the oven (or place lamb on a baking tray) and roast for 6-10 minutes depending on thickness and preferred doneness:
Remove the lamb from the oven and rest for 5-7 minutes under foil. This allows the juices to redistribute, keeping the meat moist and tender.
Slice the lamb against the grain and serve with a dollop of roasted garlic yoghurt. Accompany with roasted or sautéed seasonal vegetables and new potatoes or mashed potato. Drizzle any pan juices over the lamb for extra flavour.
For the lamb:
For the roasted garlic yoghurt:
To serve: