Wash your sole fish to get rid of any dirt or unwanted particles, then dry it off with a paper towel to get rid of excess water. It is necessary to get rid of the excess water before you coat your fish with cornstarch. If the excess water is not adequately removed, it can make your fish soggy rather than crispy.
Slice your fish obliquely into blocks with the same width to give it a uniform outlook.
Add one spoon of salt to season the fish, add the cooking wine, stir evenly with black pepper and marinate for 1 hour.
Pour olive oil into the marinated fish and mix well. Put it in your cornstarch so that the surface of the fish pieces sticks evenly.
Preheat the fryer to 200 degrees 10 minutes in advance, put the fish in the frying basket, and let it fry for ten minutes. It is necessary to preheat your air fryer ten minutes before putting your fish. Preheating will enable the temperature and airflow of the fryer to be at the right level. This will help to cook your fish evenly.
After frying for 10 minutes, brush a layer of light soy sauce (light soy sauce and olive oil), turn it over, brush another layer, and continue frying at 200 degrees for 10 minutes.
You can take out the fish after ten minutes, but if you are not sure if the fish is cooked to your desire, you can use a fork to test if it flakes easily. If it flakes easily, it is a sign that the fish is ready to be served; if not, you can fry it for another one or two minutes.
Take the fish out of the air fryer and serve while it is still warm. You can serve it alongside the pesto sauce as a dipping sauce.