How to make it
Mix marinade ingredients. Coat fish with this mixture.
Cut 4 pieces parchment paper, about 11 x 19 inches each.
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.
Fold and twist the sides to form packets, tucking loose ends under.
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.