"Rich and creamy, these potatoes au gratin are layered with Gruyère, Parmesan, garlic, and fresh thyme, making each bite irresistibly cheesy and flavorful!..."
INGREDIENTS
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2 cups heavy cream
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1/4 cup unsalted butter, melted
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3 cloves garlic, minced
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2 teaspoons fresh thyme leaves
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1 teaspoon salt
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1/2 teaspoon black pepper
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2 1/2-3 pounds Russet or Yukon Gold potatoes
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1/2 yellow onion
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1 1/2 cups grated Gruyère cheese
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1/2 cup grated Parmesan cheese