Heat the grill to high.
To cook the pak choi: Heat a tablespoon of oil in a frying pan over a low heat. Add the ginger, garlic, chilli and shallot. Then add the pak choi, cut side down, and cook gently for a minute. Cover the pan and cook for a further two minutes. Remove the pak choi and keep warm. Keep the liquid in the pan to make the sauce.
To cook the trout: Brush a little of the melted butter over a baking tray. Lay the trout fillets on top, skin side down, and brush over the rest of the butter. Season with a little salt. Cook for 4-6 minutes depending on the size of the trout fillets.
For the sauce: To the contents in the frying pan add the soy sauce, sesame oil, honey, a tablespoon of olive oil, the sesame seeds and juice of half a lemon. Stir and heat gently for a minute.
To serve: Place the trout and pak choi onto four plates and drizzle over the sauce. Serve with brown rice and a green salad.