Preheat oven to 220°C.
Preheat a ridged grill pan on a very high temperature for about 10 minutes.
Cut the potatoes lengthwise in halves. Sprinkle each with the sugar and salt.
Drizzle oil on the grill pan, turn the heat down to high and place each potato cut side down on the pan to create grill marks, across the wider part of the potatoes.
Cook briefly just until you have a nice sear on the potato.
Wrap each piece in foil separately and place onto a tray. Bake for 20-25 minutes or until tender. Serve hot.
Serve with the very delicious Slow Roast Leg of Lamb or with any other roasted meat of choice.