Preheat the oven to 180°C (350°F). Line a baking tray with parchment paper and set aside.
Slice the squash into thin, even rounds — no need to peel or remove the seeds (they’ll roast beautifully, and I’ll show you a delicious way to use them soon!).
Add the slices to a bowl with olive oil, Parmesan, and seasonings, then toss well until everything is evenly coated — using your hands makes it easier.
Spread the slices on the prepared tray in a single layer so they crisp up evenly.
Bake for 30–40 minutes, checking around minute 20 as the time may vary depending on thickness.
For a quicker version, air-fry at 180°C (350°F) for 10–15 minutes, shaking the basket halfway through for even crisping.