Preheat air fryer at 180°C for 3 minutes.
In a large bowl, combine Brussels sprouts, broccoli, onion and capsiums.
Toss with olive oil, chili powder, cumin and coriander.
Add vegetable mixture to ungreased air fryer basket.
Cook for 15 minutes, tossing every 5 minutes.
Transfer to four medium bowls and serve warm.