carmelized onion and spinach pizza pie

from "Once a Month Mom"
NOTE: This recipe serves 4 people for 3 DINNERS... that's 12 servings

1 batch bread dough (4 pounds)          
1    Tablespoon    Olive Oil           
3    cups    Yellow Onion, thinly sliced           
2    Cups    Spinach, fresh           
2    teaspoons    Garlic, cloves           
2    Cups    Mozzarella, shredded           
1    Cups    Feta cheese
2 cups ricotta cheese       
1 package pepperoni (or Italian sausage)
2 Cups Marinara Sauce (more?)           
1 teaspoon salt           
1 teaspoon pepper           
                   
Directions:
1. Heat the olive oil in a large skillet, add the onion and a generous pinch of salt. Cook over medium-high heat until brown about six minutes. Add the garlic.
2. Add the spinach in handfuls, allowing each addition to wilt before adding the next. Season with pepper and additional salt to taste. Remove from heat and set aside.
3. Roll out the remaining 1/2 of dough on a lightly floured surface, into a circle about 8-inches in diameter. Cover it with a clean towel while you lightly grease a deep dish 8x8 pans with olive oil.
Remove the towel and roll out the dough into an even larger, thinner circle, measuring 16-inches in diameter.
4. Place into pan and gently ease the dough into the corners and up the sides of the pan, leaving some hanging slightly over the rim.
5. Preheat your oven to 400 degrees F.
6. Add about 1/4 cup of your pasta sauce and spread evenly over the bottom and sides of the dough using a spoon.
7. Sprinkle the bottom with half the feta cheese, then half the onion mixture, then half the mozzarella. Add a layer of pepperoni.
8. Repeat again, beginning with the sauce and ending with the mozzarella cheese.
9. Roll out the smaller piece of dough you set aside earlier, into a circle about 8-inches in diameter. Place this on top of your filling. Use a knife or scissors to trim the edges of the dough lining the pan, so that they can be folded in over the top crust and overlap it slightly.
10. Brush the top of the crust with a little olive oil, about 1 tablespoon, then let the pie rest at room temperature for 15 minutes.
11. Place the pie in the middle of the preheated oven and bake until the top is golden brown, about 40 minutes. Carefully remove the side of the pan and allow the pie to cool. Cover with foil and freeze until ready to serve.

To Serve: Warm in a 350 degree oven for about 25 minutes. "                   
                   
Containers Needed:    4    Deep Dish 8x8 pans           
        Plastic Wrap           
        Foil