Finely chop the Tilapia fillet and place it in a bowl.
Add the following ingredients: soy sauce, fish sauce, salt, pepper, sugar, onion oil, minced garlic, seasoning powder, green onions, egg whites, and cornstarch. Mix all the ingredients until well combined. Set aside.
Cut the slices of white bread into small squares and place them in a container.
Take 1 tablespoon of the mixture, shape it into a ball using two tablespoons.
Place the Tilapia ball into a piece of bread, ensuring it is coated evenly. Repeat the process until all the mixture is used.
Heat frying oil in a pan, then add the Tilapia balls. Fry them until golden brown.
The Fried Tilapia Bread Balls are ready to be served according to your preference.