1

Remove beef from fridge 60 minutes before cooking. Preheat oven to 200°C. Combine mustard, oil, lemon rind, 1/3 cup lemon juice and freshly ground black pepper in a bowl. Whisk until well combined.

2

Place beef in a lightly-greased roasting pan. Pour marinade over beef and turn to coat all sides. Place on shelf just above centre of oven and roast for 20 minutes.

3

Remove beef from oven and baste with pan juices. Reduce oven to 180°C and roast for a further 24 minutes. Remove from oven and baste again.

4

Arrange mushrooms around beef and turn to coat in pan juices. Return to oven and roast both for a further 20 minutes (for medium beef). Cover and set aside for 15 minutes to rest. Serve beef with mushrooms, pan juices and beans.