Spray an 11 X 7X 1 1/2 inch baking pan with nonstick cooking spray.
Combine the ricotta cheese, 1 cup of mozzarella cheese, egg and spinach in a bowl and mix well to combine all ingredients.
Spread 1/3 of the sauce in bottom of pan. Top with 3 uncooked noodles, the ricotta cheese mixture, the grated parmesan cheese, and 1/3 of the sauce. Top with remaining uncooked noodles and remaining sauce.
Cover tightly with aluminum foil.
Bake at 375 for 1 hour.
Remove cover and top with remaining mozzarella cheese.