Cook pasta according to directions on package. In the
meantime pour the spaghetti sauce into a bowl. Add
chopped zucchini, and stir. Pour a little of the spaghetti
sauce mixture on the bottom of a 9x13 glass pan. Then
layer: pasta, sauce, cheese. Repeat layers, ending with
cheese on top. Cover with aluminum foil. Bake for 45
minutes at 375º. Uncover and continue baking for
another 5 minutes.