Spinach Gratin

Directions

1. 1
   Preheat the oven to 425 degrees F. Melt the butter in a heavy-bottomed saute pan on medium heat.
2. 2
   Add the onions and cook for about 5 to 6 minutes or until translucent.
3. 3
   Add the spinach to the sauce, cook for about a minute or until the spinach is just wilted.
4. 4
   Add the flour and nutmeg, stir and cook for 2 more minutes.
5. 5
   Add the cream and milk and cook until thickened.
6. 6
   Add 1/2 of the Parmesan cheese and mix well.
7. 7
   Season with salt and pepper and transfer to a baking dish and sprinkle the remaining Parmesan and the Gruyere.
8. 8
   Bake for 20 minutes until hot and bubbly.
9. 9
   Serve immediately.