Foryoueats: The Food Lab's Creamed Spinach Recipe

Ingredients

• 3 tablespoons unsalted butter
• 2 medium shallots, finely minced (about 1/2 cup)
• 2 medium cloves garlic, minced or grated on a Microplane (about 2 teaspoons)
• 2 pounds curly spinach, trimmed, washed, and drained
• 1 tablespoon all-purpose flour
• 1 1/2 cups heavy cream
• 1/2 cup whole milk
• 1/4 teaspoon freshly grated nutmeg
• 1/4 cup store-bought or homemade crème fraîche
• Kosher salt and freshly ground black pepper
• 2 ounces Parmigiano-Reggiano, finely grated (about 1 cup; optional)