Spinach Gratin

Ingredients

• 3 tbsp whipped butter, I used Land O Lakes
• 1 cup finely chopped onion
• 1/4 cup flour, use Gluten free AP flour for GF
• 1/4 tsp fresh grated nutmeg
• 3 cups 2% milk
• 3 lbs frozen chopped spinach, defrosted, I used 3 16-oz packages
• 3/4 cup freshly grated Parmesan cheese
• 1 tbsp kosher salt
• 1/2 tsp freshly ground black pepper
• 1/2 cup shredded Swiss or Gruyere cheese

Instructions

1. Preheat the oven to 425F°.
2. In a heavy-bottomed saute pan melt the butter over medium heat. Add the onions and sauté until translucent, about 10 - 12 minutes.
3. Add the flour and nutmeg; cook 2 more minutes, stirring occasionally.
4. Add the milk and cook until thickened, about 5 - 7 minutes.
5. Squeeze as much liquid as possible from the spinach and add the spinach to the sauce.
6. Add 1/2 cup of the Parmesan cheese and mix well. Season to taste, with salt and pepper.
7. Transfer the spinach to a large baking dish and sprinkle the remaining 1/4 cup Parmesan and the Swiss cheese on top. Bake for 20 minutes until hot and bubbly. Serve hot.

Link to recipe