- Preheat the oven to 180C.
- Wash the potatoes and remove any blemishes. Lay the potatoes flat and make 5mm cuts almost through to the other side.
- Place in a baking dish just large enough to hold the potatoes comfortably. Combine the butter and oil and brush generously over the potatoes. Bake for 20 minutes and brush with more butter/oil mixture. Continue baking for about 20 minutes or until cooked. Brush with more butter/oil, season with salt and pepper and sprinkle with the parmesan. Bake until the cheese is melted.
More Christmas dinner sides from Jan