In a shallow bowl, mix together the flour, salt, and black pepper.
In a second bowl, add egg and water and beat slightly.
In a third bowl, place the breadcrumbs.
Coat the avocado slices with flour mixture, then dip into egg mixture and finally, coat with the breadcrumbs.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 400 °F to preheat for 5 minutes.
Spray the avocado slices with cooking spray evenly.
After preheating, arrange the avocado slices into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 7 minutes.
While cooking, flip the avocado fries once halfway through.
After cooking time is finished, remove the avocado fries from Air Fryer and serve.