Preheat oven to 450°F. Lightly spray a baking dish with non-stick spray.
Combine breadcrumbs and 2 tablespoons of grated parmesan cheese in one bowl and egg whites in another.
Shred or finely chop 1.5 oz of mozzarella cheese. Combine with the remaining grated parmesan cheese, squeezed dry spinach, ricotta cheese, and 2 tablespoons of egg whites.
Lay chicken cutlets flat on a work surface. Season with salt and pepper. Spread about 2 tablespoons of the spinach-cheese mixture onto each cutlet. Loosely roll each cutlet and place seam-side down in the prepared baking dish.
Dip each rolled chicken cutlet in the egg white mixture, then coat evenly with the breadcrumb mixture. Place seam-side down in the baking dish.
Lightly spray the chicken with olive oil. Bake for 25 minutes.
Remove from the oven and top evenly with the pomodoro sauce, followed by the remaining mozzarella cheese.
Bake for an additional 3 minutes, or until the cheese is melted and bubbling.
Serve hot, with additional sauce on the side and extra grated parmesan cheese, if desired.
Notes
This recipe is great for a weeknight dinner or for entertaining. It can also be made ahead and reheated.