In a small bowl, combine the spinach, mozzarella, cottage cheese, 1/2 cup Parmesan cheese and egg. Spread a heaping 1/3 cupful over each noodle. Roll up; place seam side down in a 9-in. square baking dish coated with cooking spray. Cover and refrigerate overnight.
Remove from the refrigerator 30 minutes before baking. Pour marinara sauce over roll-ups.
Cover and bake at 350° until bubbly, 33-38 minutes. Sprinkle with remaining 1/4 cup Parmesan cheese.