Cut broccoli into medium sized florets leaving the stalks on each floret as long as you prefer
Preheat air fryer to 400°F per the manufactuerer's instructions
Thoroughly rinse the prepared broccoli florets and pat mostly dry with a paper towel
Add prepared broccoli to a large mixing bowl
Drizzle the olive oil and sprinkle the garlic powder, salt and pepper over the broccoli
Toss to combine, using clean hands to work the oil and spices evenly over all of the broccoli
Add broccoli in a single layer to the basket of your air fryer
Air fry for 4 minutes, then carefully toss the broccoli
Air fry for an additional 4 to 6 minutes or until the broccoli is done to your liking
Repeat with additional batches as needed to cook all of the broccoli
Top with crushed red pepper flakes, fresh lemon zest, fresh lemon juice and freshly grated parmesan cheese to taste before serving