Cheesy Spinach Roll-Ups

My friend Sonya shared this with me several years ago.  I have been enjoying this dish - that is very similar to Lasagna ever since. 

Ingredients:
17 lasagna noodles

Mix in a bowl:
2 eggs
2 1/2 cups ricotta cheese
2 cups shredded mozzarella 
1/2 cup Parmesan cheese
1/2 tsp salt 
1/2 tsp nutmeg
1/2 tsp pepper
Box of frozen spinach, thawed and drained, squeezed and then patted dry! (in other words - get all the liquid out you can!)

Saute together:
4 Tbsp Butter
1/2 Onion chopped

1 jar of Ragu Mushroom sauce (or your favorite variety)

Take 1 cup of your filling mixture and spread in a 9X13 pan.
In each individual noodle spread 1/3 cup of your cheesy filling and roll up.  Place Seam side down in your baking dish. Top the Cheesy Spinach Roll-ups with the Marinara sauce.  Sprinkle with a bit more Parmesan Cheese.
Bake at 375 for 25-30 minutes or until it is bubbling.
Serve with Salad and French Bread!
This will usually yield 12 Cheesy Spinach Roll-ups.  If you have extra's you will just need to have more marinara on hand.