Take the lamb out of the fridge and allow to come to room temperature. This will take approximately 30 minutes. Pre-heat the barbecue or a frying pan on a high heat. Brush the lamb fillets/steaks with olive oil, season with a little salt and black pepper and place on the barbecue or in the pan. Cook them for 2 minutes on each side, then reduce the heat and continue to cook depending on your preference and the thickness of the cut. Remove from the barbecue or pan and leave to rest for 2 minutes.