Drain and thoroughly rinse your soaked chickpeas. Pat them completely dry with a clean kitchen towel to remove excess moisture.
In a food processor, combine the soaked chickpeas, onion, garlic cloves, green chilies, fresh coriander, cumin powder, and red chili powder. Pulse carefully until you achieve a coarse grind resembling wet sand. Do not over-process into a smooth paste.
Transfer the coarse mixture to a bowl. Add your salt and stir in 1 to 2 tablespoons of besan (gram flour) to seamlessly bind everything together.
Scoop out about 2 tablespoons of the mixture at a time and gently shape them into slightly flattened discs or patties.
Preheat your air fryer to 375°F (190°C). Arrange the patties in a single layer in the basket, leaving a little space between them. Brush or spray them with just a tiny bit of oil and air-fry for 12–15 minutes, gently flipping them halfway through, until they are beautifully golden-brown and crispy.