Spinach Gratin

One of my favorite foods in spinach.I love it in any way, shape, or form. This delicious recipe by Ina Gartin has been served in my house many, many times. It is wonderful as a holiday side dish.



Ingredients

* 4 tablespoons (1/2 stick) unsalted butter
* 4 cups chopped yellow onions (2 large)
* 1/4 cup flour
* 1/4 teaspoon grated nutmeg
* 1 cup heavy cream
* 2 cups milk
* 3 pounds frozen chopped spinach, defrosted (5 (10-ounce) packages)
* 1 cup freshly grated Parmesan cheese
* 1 tablespoon kosher salt
* 1/2 teaspoon freshly ground black pepper
* 1/2 cup grated Gruyere cheese

Directions

Preheat the oven to 425 degrees F.

Melt the butter in a heavy-bottomed saute pan over medium heat. Add the onions and saute until translucent, about 15 minutes. Add the flour and nutmeg and cook, stirring, for 2 more minutes. Add the cream and milk and cook until thickened. Squeeze as much liquid as possible from the spinach and add the spinach to the sauce. Add 1/2 cup of the Parmesan cheese and mix well. Season, to taste, with salt and pepper.

Transfer the spinach to a baking dish and sprinkle the remaining 1/2 cup Parmesan and the Gruyere on top. Bake for 20 minutes until hot and bubbly. Serve hot.