Step 1

Preheat the oven to 190°C.

Step 2

Place the potatoes in a baking dish.

Step 3

Drizzle with 1 tablespoon oil, season and cover with foil. Bake for 50-60 minutes, until tender. Allow to cool slightly.

Step 4

Meanwhile, combine 2 tablespoons oil, spring onion, garlic, parsley, oregano and olives in a small bowl. Season to taste with salt and pepper, then set aside.

Step 5

Preheat a barbecue or chargrill pan on high heat. Halve potatoes, drizzle with 2 tablespoons oil and season. Grill for 5 minutes each side, turning occasionally, until heated through and charred.

Step 6

Transfer potatoes to a large serving bowl, then pour over the dressing and toss to coat well. Scatter with the parmesan, then serve warm.