Divide bread dough into 8 equal pieces.
Place on a floured surface and cover dough with a towel.
Let dough rest while preparing filling.
In a skillet mix onion, water, and garlic.
Cover; cook till onion is tender.
Add spinach and Italian seasoning.
Cover; cook till spinach is thawed, stirring once or twice to break up spinach.
Uncover; cook and stir till liquid has evaporated.
Meanwhile, in a medium mixing bowl combine egg, ricotta, mozzarella, and Parmesan cheese.
Roll each portion of dough into a 6 inch circle.
Spoon about 2 tablespoons of the spinach mixture onto one half of each circle.
Top spinach mixture with 1/4 cup of the cheese mixture.
Moisten edges of dough with a little water.
Fold each circle in half, pressing edges together to seal.
Flute edges, if desired.
Prick tops with the tines of a fork.
Place on a baking sheet that has been sprayed with nonstick spray coating.
Bake in a 375° oven for 15 to 20 minutes or till golden.
Meanwhile, heat pizza sauce.