Cut the fish into bite size. Marinade it with the seasoning for 10 mins. Add in egg and cornstarch. Mix it well
Heat the pan over medium heat with 3-4 tbsp of oil. Add in the fish fillet. Pan fry until both side are golden and cripsy. Set aside
Heat the pan over medium high heat with 1 tsp of oil. Add in the onion and sautee until soft. Add in tomato and sugar. Sautee until the tomato is soft. Add in the chicken powder, water and mix well. Turn the heat to low. Cover and simmer for 15 mins
Add in fish sauce, dark soy sauce to taste. Turn back to high heat. Add in enough starch mixture to thicken the sauce
Add in the fish. Mix it well and dish it up. Enjoy