In A Small Bowl, Combine The Spinach, Monterey Jack Cheese, Egg And Onion. On A Baking Sheet Coated With Cooking Spray, Roll Pizza Dough Into A 14-In. X 10-In. Rectangle; Seal Any Holes. Spread Spinach Mixture To Within 1/2 In. Of Edges. Roll Up Jelly-Roll Style, Starting With A Long Side; Seal Ends And Place Seam Side Down. Brush With Butter; Sprinkle With Parmesan Cheese. Bake At 400