The Potato Side Dish That Won't Even Last 10 Minutes on Thanksgiving (No, Not Mashed!)
"It wins the award for coziest side dish...."
INGREDIENTS
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2 tablespoons unsalted butter
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1 medium yellow onion, thinly sliced
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4 sprigs fresh thyme, plus more for garnish
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1 1/2 teaspoons kosher salt
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1 teaspoon freshly ground black pepper
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1 teaspoon all-purpose flour
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1/4 cup dry white wine, such as Pinot Grigio
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1 1/2 cups low-sodium beef broth
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2 1/2 pounds large Yukon Gold potatoes (4 to 6), peeled and sliced 1/8-inch thick
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4 ounces shredded Gruyère cheese (about 1 cup), divided
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4 ounces finely grated Parmesan cheese (1 cup store-bought grated), divided
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1/2 cup heavy cream
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