INGREDIENTS
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5 tablespoons unsalted butter
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1 to 2 garlic cloves
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Salt
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6 large waxy potatoes (about 2 1/2 pounds), such as red bliss, peeled and sliced about 1/8-inch thick
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2 cups half-and-half
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Freshly ground black pepper
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Fresh nutmeg
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1 cup grated Gruyère