Sear the roast for 60 seconds per side, to develop a dark, flavourful crust.
12 Toss a knob of butter and an extra sprig of thyme into the pan for the last 30 seconds, spooning the foaming butter over the meat.
13 The next step is very important..
14 Transfer the roast to a plate and tent loosely with foil.
15 Rest for at least 10–15 minutes. This allows the fibres to relax and reabsorb the juices. The meat will carry on cooking during this time and a nice medium should be achieved.