Preheat the oven to 450 degrees
Line two baking sheets with parchment paper
Thinly slice the zucchini with a knife or mandoline, making sure to produce even slices
In a large bowl, combine the oil, salt, pepper, onion powder, and paprika
Add the zucchini slices to the bowl and toss well so that each slice is coated with the seasoned oil
Place the zucchini slices on the prepared baking sheets
Bake for 8-15 minutes, when the zucchini starts to show some brown spots remove from the oven and set aside
Reduce the oven temperature to 180-200 degrees.
Return the zucchini to the oven and cook for an additional 20-40 minutes or until the slices are crispy
Remove from the oven and cool