Put some breading on the fish by dipping it on the beaten egg mixture.
Place the cornstarch in a clear plastic bag and put-in the fish. Close the container (be sure that there is some air inside) and shake until the cornstarch is evenly distributed on the fish.
Fry the fish and set aside.
On a separate pan, sauté the onion and put-in the Chinese black beans.
Add the green onion and parsley and simmer for 3 minutes.
Add water and let boil.
Put-in the fried fish fillet and simmer for 5 to 7 minutes.
Add salt and pepper to taste.