Preheat your air fryer to 375° on bake.
Wash and slice your zucchini in half widthwise and cut each half into spears.
In the first bowl, add flour and season to taste. In the second bowl, beat one egg and a Tbsp. of water. In the third bowl, add panko, parmesan cheese, and season to taste. I used garlic powder, onion powder, paprika, oregano, basil, salt, and pepper.
Individually, dredge a spear of zucchini in flour. Shake off the excess flour, then coat in egg, then drop into breadcrumbs to coat. Continue until all spears are prepared.
Place spears on slotted tray in an individual layer, not touching. You will use two trays for this amount of zucchini.
Spray the top with a light coating of oil.
Place one tray on the bottom tray rack and one tray directly above that. Bake for 5 minutes.
After 5 minutes, rotate the trays by moving the bottom tray up and the top tray down. Cook for 5 minutes.
After 10 minutes, flip each of the spears and again coat with a light spray of oil. Return the trays to the oven, rotating positions once again. Cook for another 5 minutes.
After 15 minutes, finally rotate the trays one last time. This ensures each side of the zucchini has had enough time to brown up. Cook for the last 5 minutes.
After 20 minutes, remove and plate your air fryer zucchini. Serve with marinara, ranch, or any dip of your choosing.