or a little oil for greasing the pan
Directions
Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch baking pan with nonstick spray or a thin layer of oil.
Pour the uncooked elbow macaroni evenly into the bottom of the baking pan, spreading it into a flat layer so it cooks evenly.
Sprinkle 1 cup of the shredded mozzarella cheese and all of the grated Parmesan cheese evenly over the dry macaroni.
Give the bottled zesty Italian dressing a good shake, then slowly pour it evenly over the macaroni and cheese mixture, making sure to cover as much of the pasta as possible. Gently tilt the pan back and forth so the dressing seeps down around the noodles.
Cover the pan tightly with aluminum foil to trap in steam. This is important because the pasta will