"Is there anything better than a molten, golden-topped potato gratin I don’t think so, either This one stays fairly classic — scented with sage, garlic and nutmeg, then showered with lots of nutty Gruyère..."
INGREDIENTS
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1/4 cup unsalted butter (1/2 stick), plus more for greasing the aluminum foil, at room temperature
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3 cups heavy cream
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1/4 cup chopped fresh sage leaves
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4 fat garlic cloves, finely grated or minced
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1/4 teaspoon freshly grated nutmeg
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1 1/2 teaspoons fine sea salt, plus more as needed
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5 large eggs
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4 pounds russet potatoes (about 6 large or 8 medium)
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Freshly ground black pepper
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2 1/4 cups grated Gruyère (8 1/2 ounces)