Preheat oven to 350ºF.
In large bowl, stir together spinach, cottage cheese, egg, Parmesan cheese, 2/3 cup mozzarella cheese, parsley, salt and ground black pepper; set aside.
Prepare pasta according to package directions; drain. Toss hot pasta with 2-1/2 cups pasta sauce.
Arrange half of pasta mixture in bottom of 12 x 8 inch baking dish. Layer spinach mixture evenly over pasta, cover with remaining pasta. Spread remaining sauce over top, sprinkle with remaining mozzarella cheese and additional Parmesan cheese, if desired.
Bake 35 to 40 minutes or until hot and bubbly.
Servings 0