• prep: 30 min
• cook: 0 hr
• total: 30 min

servings:

Young fontina, a superb melting cheese, adds lushness and a little tang to the strata. And remember to put whole nutmeg on your shopping list; a bit of the freshly grated spice amplifies the other flavors.

• 2 tablespoons extra-virgin olive oil
• 1 small onion, finely chopped
• 1 teaspoon coarse salt, divided
• 2 pounds spinach, stems removed and leaves coarsely chopped
• 1/4 teaspoon freshly ground pepper
• 1/4 teaspoon freshly grated nutmeg
• Unsalted butter, for dish
• 1 pound challah loaf, sliced 1/2 inch thick
• 8 ounces young Italian fontina cheese, grated, divided
• 1 ounce Parmesan cheese, grated (1/3 cup), divided
• 8 large eggs, divided
• 2 2/3 cups whole milk, divided

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