01 -
Preheat the oven to 220°C (425°F). Line a rimmed baking sheet with high-heat-resistant parchment paper and coat it with olive oil spray.
02 -
Slice the zucchini into 3 mm (⅛-inch) thick rounds.
03 -
Sprinkle the slices with ½ teaspoon kosher salt. Place the salted zucchini in a colander in the sink and let them stand for 30 minutes to draw out moisture. After 30 minutes, rinse and blot dry using paper towels.
04 -
Arrange the zucchini slices in a single layer on the prepared baking sheet. Spray them with olive oil and bake for 15 minutes.
05 -
Remove the baking sheet from the oven. Sprinkle zucchini slices with the remaining ¼ teaspoon kosher salt, black pepper, garlic powder, and grated parmesan. Return the pan to the oven and bake for an additional 15-20 minutes, until browned and crispy.