Fillet the fish and slice the fillets into thick slices. Marinate with salt, Shaoxing wine, pepper and ginger for at least 15 minutes. Lightly coat the fish in cornflour.
Heat 3 tablespoons oil in a frying pan over high heat until hot. Pan fry the fish until golden. Set aside.
Wipe the pan clean. Add oil and heat until hot. Stir in the sugar, tomato puree, black vinegar, spring onion, sesame oil, salt and water. Stir and bring to the boil.
Add a little bit of cornflour slurry to thicken the sauce.
Add the fish and gently stir to coat the fish with the sauce. Serve.
Ingredients
Chinese black vinegar and Shaoxing wine can be purchased in Asian speciality shops.