First, preheat the air fryer to 200 degrees Celsius or 40 degrees Fahrenheit.
In the meantime, trim the ends of your courgette and slice it into half (length-wise), followed by half-moon cuts.
Toss the courgettes with pepper, salt, garlic powder, onion powder, olive oil, and nutritional yeast.
Next, transfer the seasoned courgettes into the air fryer basket in a single layer. Do not overcrowd the fryer, or else you will be left with undercooked courgettes.
Cook for five to seven minutes and flip them halfway through.
Once the time is over, remove the courgettes from the air fryer and add seasoning. Serve them piping hot and enjoy this mid-meal snack.