Preheat the oven to 220C/425F/200FAN/Gas Mark 7 and add the oil and butter.
Peel the potatoes and place them in water.
Use a melon baller to cut round pieces of potato.
Bring a pan of water to the boil and add ½ teaspoon salt, add the potato balls and cook for 5 minutes.
Drain the potatoes in a colander.
Add the potatoes to the roast dish and stir to coat in the butter.
Roast the potatoes for 15 minutes then turn them over and season with the remaining salt and pepper.
Cook for a further 15 minutes before serving.
Notes
Disclaimer:The nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors, but we have endeavoured to be as accurate as possible.It should be noted that the nutritional information assumes that all the ingredients are consumed even though some butter and oil will remain in the serving dish.The amount of potatoes equates to about 7 large ones.