Creamy Baked Spinach

I was originally given this gratin recipe by a friend, and it was delicious. But, i couldn't leave well enough alone and have tweaked the recipe this way and that, and i really think it's fantastic - you let me know.

Steps

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.

Cool 10 minutes then quickly beat in the eggs.

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

Add 1 / 2 cup each of the parmesan , gruyere and cheddar cheeses and all of the feta and mix well.

Season , to taste , with salt and pepper.

Transfer the spinach to a buttered 13 x 9 inch glass baking dish.

Toss the remaining cheeses with the breadcrumbs and sprinkle on top.

Bake for 20-25 minutes , until hot and bubbly.

Serve hot.

Ingredients

butter, onions, flour, nutmeg, heavy cream, milk, eggs, frozen chopped spinach, kosher salt, fresh ground black pepper, parmesan cheese, gruyere cheese, cheddar cheese, feta cheese, breadcrumbs