Preheat your oven to 325°.
Preheat the potatoes to speed up the baking time. Put the sliced potatoes into a large saucepan with the salt, pepper, nutmeg, garlic and cream. Gently toss to coat evenly. Bring to a boil for just a few moments. Once the potatoes are heated through they are ready for the oven.
Pour the steaming hot potatoes into your favourite oven proof baking dish. Sprinkle the top with the grated cheddar cheese. Bake for 1 hour and 20 minutes. The potatoes will be tender and the cheese bubbling and golden.
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