Created by KittenCal on December 12, 2012
Step 1: NOTE: if using all mozzarella cheese add in 1/3 cup fresh grated Parmesan cheese. --- Preheat oven to 375 degrees F. Fit bottom crust into a 10-inch pie plate. Cover with a clean tea towel. Place in the fridge until ready to fill.
Step 2: Heat a large skillet over medium-high heat cook the sausage with onion stirring until browned. Add in garlic; cook 2 minutes. Drain excess grease.
Step 3: Separate one egg and set yolk aside. Whisk egg white and remaining 5 eggs in a bowl until frothy. To the eggs, fold in spinach, 4 cups Italiano shredded cheese (if using all mozzarella cheese then also add in 1/3 cup Parmesan cheese) ricotta cheese, salt and pepper.
Step 4: Pour filling into the bopttom crust. Place the remaining pastry over the top; trim, seal, and flute edges; cut slits in pastry. Beat water and remaining egg yolk in a small bowl; brush the mixture over top of pie (you will not use the complete egg/water mixture, refrigerate for another use if desired).
Step 5: Place the pie plate onto a baking sheet (to protect oven from any possible spills). Bake in preheated oven until crust is golden and filling is bubbly (about 40-45 minutes). Let stand 10 minutes before cutting.