Heat the water in a pan. When it is hot, add the sweet corn and cook for 2 minutes.
Drain the corn well in a strainer.
Add the corn to a bowl. Add the black pepper, red chilli powder, oregano, cornstarch and salt.
Mix well, so the corn is coated with the spices.
Preheat the air fryer at 360°F (180°C) for 2 minutes.
Spray the basket lightly with oil. Spread the corn in one layer.
Air fry at 400°F (200°C) for 15 minutes. Toss the corn 2 to 3 times while it cooks.
If the corn looks dry, spray a little oil. Cook until golden and crispy.
Serve hot.