In a food processor, add the zucchini and carrot and pulse until finely chopped.
Add the chicken, mustard powder, garlic powder, onion powder, salt, and black pepper and pulse until well combined.
In a shallow dish, place the flour.
In a second dish, mix together the milk and egg.
In a third dish, put the breadcrumbs.
Coat the nuggets with flour, then dip into the egg mixture and finally, coat with the breadcrumbs.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of the Air Fryer to 390 °F to preheat for 5 minutes.
After preheating, arrange the nuggets into the greased Air Fryer Basket in a single layer.
Slide the basket into Air Fryer and set the time for 10 minutes.
After cooking time is finished, remove the nuggets from Air Fryer and serve.