Step 1

Preheat oven to 200°C. Heat 2 tsp of the oil in a large roasting pan over high heat. Cook the lamb for 2 mins each side or until browned all over. Transfer to a plate.

Step 2

Add remaining oil to the pan. Add sweet potato and cook, turning, for 5 mins or until lightly browned. Remove from heat. Add tomatoes and return the lamb to pan. Spread mustard over lamb. Roast for 25-30 mins for medium or until cooked to your liking. Set aside, covered, for 5 mins to rest.

Step 3

Combine mint and parsley in a small bowl. Sprinkle over the vegetables and lamb. Serve with salad leaves.