1 medium zucchini
1+ tablespoon olive oil
Preheat oven to 220 degrees and line a baking sheet with parchment paper. Thinly slice the zucchini into circles. Place the slices between 2 sheets of paper towels and press on them to extract as much moisture as possible. Line them up on the baking sheet tightly but without overlapping. Then take a pastry brush and brush the olive oil on each zucchini slice. Lightly sprinkle with salt. Be conservative, because you can easily over-salt. You can always add more later. Bake for 2+ hours until they start to brown and get crispy. Let cool before removing and serving. Store in an airtight container.