Preheat the oven to 115C/225F. Line a large baking sheet with parchment paper.
Slice the zucchini into very thin slices. Using a paper towel or dish towel, pat the zucchini dry, to ensure all moisture is removed.
Transfer the zucchini into a large mixing bowl. Add the olive oil and salt and mix well, until the zucchini is lightly oiled.
Place the zucchini on the lined sheet in a single layer. Bake for 90 minutes, or until crispy and golden brown. Remove from the oven and allow to cool completely.
Notes
* Adding extra salt will soften the chips and draw out extra liquid. Add more salt once they are cooked and cooled.Air fryer instructions: Place the oiled and seasoned zucchini in a single layer in the air fryer pan. Cook at 200C/400F for 12 minutes, flipping halfway through. Let the chips cool completely. TO STORE: Leftover chips can be stored in a sealable container at room temperature, for up to 3 days. If you'd like them to keep for longer, refrigerate them for up to 1 week. TO FREEZE: Place chips in a ziplock bag and store them in the freezer for up to 6 months.TO REHEAT: Either reheat in an air fryer or a preheated oven.