Clean the fish. Remove the bones and the skin. Cut the fish into 1” wide by 1-½” long and ¼” thick pieces. Marinate with 1 egg white, 1 tablespoon of cornstarch, ¼ teaspoon of salt and ¼ teaspoon of black pepper for about half an hour.
Coat each piece of sliced fish in cornstarch and quickly drop into the very hot oil to deep fry about 1 minute until it becomes