1-Preheat your oven to 225°F (110°C): Preheat your oven to 225°F (110°C).
2-Slice the zucchinis thinly to about 1/8: Slice the zucchinis thinly to about 1/8 inch thick using a mandoline or sharp knife.
3-Pat the zucchini slices dry with a: Pat the zucchini slices dry with a paper towel.
4-Place the dried zucchini pieces into a: Place the dried zucchini pieces into a large mixing bowl. Drizzle the olive oil over them and mix thoroughly until well-coated.
5-Sprinkle the sea salt, garlic powder, paprika,: Sprinkle the sea salt, garlic powder, paprika, and black pepper over the zucchini. If using, add the Parmesan cheese for extra flavor. Toss again until everything is evenly distributed on the slices.
6-Lay the zucchini slices in a single: Lay the zucchini slices in a single layer on the prepared baking sheet, ensuring they do not overlap.
7-Bake in the preheated oven for 45-60: Bake in the preheated oven for 45-60 minutes, flipping the chips halfway through for even crispiness.
8-Once baked, transfer the crunchy chips to: Once baked, transfer the crunchy chips to a cooling rack for several minutes before serving.