Oven Roast Beef with Rosemary Mushroom Sauce

The grainy mustard adds both texture and flavour to the outer crust of this roast recipe. These time-test results are based on a roast that was about 7½-in (19 cm) long x 3¾-in (9.5 cm wide) x 4¾-in (12 cm) deep. NOTE: ‘Time-to-cook’ figures are rough guidelines only as cook time is dependent on so many factors such as oven and thermometer accuracy, starting temperature of roast, roast shape and cut. A good thermometer is one of your best kitchen investments.