Leave the lamb out of the fridge for a couple hours before preparing so it is at room temperature.

Pre heat oven to 375

With a sharp knife evenly pierce the top of the lamb around 10-12 times, creating 1/2cm deep holes.

Take little slices of garlic and rosemary and insert them into the little holes you have created.

Melt a knob of butter over a medium heat in a large skillet and then slowly place the lamb in and pan-sear all the edges lightly.

Place the lamb into a roasting tray, lightly dust with salt and pepper and then cover with foil.

Place into the pre-heated oven for 1 hour and 45 mins. Then remove the foil for the last 15-25 mins depending on how pink you like your lamb.

Serve with roasted potatoes, vegetables and mint gravy!