INGREDIENTS
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2 tablespoons butter plus more for greasing baking dish
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1 1/4 cup whole milk
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1 1/4 cup heavy cream
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2 garlic cloves, peeled and grated
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1 teaspoon kosher salt
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1/2 teaspoon freshly-cracked black pepper
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Pinch of freshly-ground nutmeg (optional)
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3 pounds potatoes, peeled and sliced thin