1. Preheat the oven to 450ºF. Coat a baking sheet with cooking spray.
2. Slice the zucchini into 1/4-inch thick rounds. In a medium bowl, toss the zucchini with the oil. In a small bowl, combine the parmesan, breadcrumbs, salt, and a few turns of pepper.
3. Dip each round into the parmesan mixture, coating it evenly on both sides and pressing the coating on to stick. Place in a single layer on the prepared baking sheet. If necessary, press down on each zucchini coin with the back of a spoon to make the coating stick even more.
4. Bake the zucchini rounds until browned and crisp, 25-30 minutes. Remove with spatula. Serve immediately.

Source: Calorie Count [2]