In a medium mixing bowl, combine olive oil and garlic powder and whisk/stir to combine.
Add the frozen broccoli, and toss with the olive oil/garlic mixture.
Add broccoli to the air fryer basket and bake at 390F for 7 minutes. Shake, and continue cooking for 0-6 minutes until it reaches your preferred level of perfectly roasted.
Notes
The volume of broccoli will shrink dramatically as it cooks, so it is ok if the basket looks a bit crowded at first.