Cut the lasagna noodles in half crosswise. Cut fish into eight strips. Place a fish strip on the entire length of the noodle, fold the fish, as needed. Place 1/8th of the spinach at the beginning end of each lasagna. Roll up and place the rolls, seam side down, in a 38 x 25-cm (15 X 10-inch) baking dish, sprayed with oil. Cover with the sauce and cheese.