01 - Set oven to 225°F and line two baking sheets with parchment paper.
02 - Wash and dry zucchini, then slice into 1/8 inch thick rounds using a sharp knife or mandoline.
03 - Place zucchini slices on a clean kitchen towel and pat dry to remove excess moisture.
04 - Transfer slices to a large mixing bowl. Add olive oil, sea salt, black pepper, garlic powder, and smoked paprika; gently toss to coat evenly.
05 - If using, sprinkle grated Parmesan over slices and toss again for even distribution.
06 - Place zucchini slices in a single layer on prepared sheets, avoiding overlap.
07 - Bake for 35 to 45 minutes, flipping once halfway through, until golden and crisp.
08 - Remove from oven and let chips cool for several minutes to achieve maximum crispness.