Ingredients

3tbspwhipped butter

1cuponion,finely chopped

¼cupflour,use Gluten free AP flour for GF

¼tspfresh nutmeg,grated

3cups2% milk

3lbsfrozen chopped spinach,(3 16-oz packages), defrosted

¾cupparmesan cheese,freshly grated

1tbspkosher salt

½tspfreshly ground black pepper

½cupSwiss or Gruyere cheese,shredded

Preparation

Preheat the oven to 425 degrees F.

In a heavy-bottomed saute pan, melt the butter over medium heat. Add the onions and sauté for about 10 to 12 minutes until translucent.

Add the flour and nutmeg, then cook for 2 more minutes, stirring occasionally.

Add the milk and cook for about 5 to 7 minutes until thickened.

Squeeze as much liquid as possible from the spinach and add the spinach to the sauce.

Add ½ cup of the Parmesan cheese and mix well. Season to taste with salt and pepper.

Transfer the spinach to a large baking dish and sprinkle the remaining ¼ cup Parmesan and the Swiss cheese on top.  Bake for 20 minutes until hot and bubbly. Serve hot.