Spinach Gratin

Serves 6

  • 5 (10 ounce) boxes of frozen spinach, defrosted

  • 2 tablespoons extra virgin olive oil

  • 6 tablespoons unsalted butter, divided

  • 2 cups diced onions

  • 2 tablespoons minced garlic

  • 1/3 cup all purpose flour

  • 2 1/2 cups whole milk

  • 1/2 cup heavy cream

  • 1 tablespoon kosher salt

  • 1 teaspoon freshly cracked black pepper

  • 1/2 teaspoon freshly grated nutmeg

  • 1 1/4 cup freshly grated parmesan cheese

Preheat the oven to 375 degrees F.

Place the defrosted spinach in a clean kitchen towel and squeeze out as much liquid as you can then transfer to a mixing bowl. Set aside.

Heat the olive oil and 2 tablespoons of butter in a large sauté pan over medium-high heat then sauté the onions for 5-7 minutes, stirring occasionally. Add the garlic and sauté for an additional 2-4 minutes until the garlic is cooked, but not browned. Turn off the heat and transfer the onions and garlic to the defrosted spinach.

Make the roux: Turn the heat back on to medium-high and 3 tablespoons of butter to the sauté pan. Add the flour and stir to fully combine then cook for 1 additional minute. While whisking, slowly pour in the whole milk and cream and cook until the mixture thickens, about 5 minutes. It should be done when the roux coats the back of a wooden spoon. Slowly pour the roux into the bowl with the spinach, onions and garlic. Add the salt, black pepper and 1 cup parmesan cheese.

Coat the inside of a baking dish with the remaining 1 tablespoon of butter and pour the spinach mixture in. Top with the remaining 1/4 cup parmesan cheese and bake for 20-25 minutes until bubbly and browned on top. Remove from the oven, allow to slightly cool and serve warm.