How to make it
Heat the oven to 200C/180C fan/gas 6
Mix marinade ingredients. Coat fish with this mixture.
Cut out 4 pieces of baking paper each about 30x50cm.
Mix melted butter with 1 tsp. oyster sauce and toss with vegetables. Divide between the pieces of paper and finish with fish, spooning any remaining marinade over top.
Bring the long sides of the paper together at the top, fold over once then twist the sides to form parcels tucking the ends under the package.
Transfer to baking tray and bake 20 minutes, until fish is cooked. Timing will depend on thickness of fillets. Serve with cooked brown basmati or wild rice.