Preheat your air fryer to 380 degrees F for 3 minutes.
Prepare your vegetables. You need to aim for uniform size, this is the easiest way to get even cooking.
In a large mixing bowl, toss the prepared vegetables with olive oil, garlic powder, sea salt and black pepper.
Arrange the seasoned vegetables in the air fryer basket in a single layer. You need to avoid overcrowding. If necessary, cook in batches.