Preheat the oven to 425 degrees. Place an oven proof wire rack over a large rimmed baking sheet and spray it generously with cooking spray.

In a medium bowl, toss the zucchini rounds with the olive oil.

Place the parmesan, breadcrumbs and salt in a small bowl and stir well to combine.

Dip the zucchini rounds into the breadcrumb mixture until each round is well coated, then place them on the prepared wire rack.