You need a metal or cast-iron gratin dish for this, something that conducts heat well, otherwise it’s difficult to cook the potatoes in the time given.Prep time: 15 minutes | Cooking time: 45 minutesFour to six*Diana's conversion may differ from the standard We rely on advertising to help fund our award-winning journalism.We urge you to turn off your ad blocker for The Telegraph website so that you can continue to access our quality content in the future.Thank you for your support.Need help?Visit our page..
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