Dry the fish and dust both sides with cornflour. Heat the groundnut oil in a large frying pan, then add the fish, skin-side down. Cook for 2-3 minutes, turn and cook for a further minute.
Meanwhile, peel and finely slice the ginger. Heat the sesame oil in a wok. Add the ginger, chilli and spring onion and cook for 2 minutes, stirring all the time. Add the garlic and cook for a further minute then spoon over the fish.
Add the pak choi and teriyaki marinade to the wok. Cook over a high heat for 1 minute until wilted. Lay out on serving dishes and top with the seabass fillets.
Notes
We like to serve with steamed rice and lime wedges on the side, but this also goes well with noodles, or on it's own.