Wash and clean the head of broccoli and cut it into evenly sized pieces approx 1 inch.
Toss the florets in a mixing bowl with oil, salt, pepper, and garlic powder. Make sure to coat the florets evenly.
Preheat the air fryer at 400F for 3 minutes.
Add 2 tbsp water to the basket end (between the 2 layers).
Transfer the seasoned broccoli to the air fryer basket.
Set temperature to 375 F (190 C) and cook for 5 - 6 minutes.
Pause and check the halfway at 4 minutes mark.
Remove once done and sprinkle some parmesan cheese.
Serve hot with a dash of lemon juice.