Flaked fish parcels with soy and mirin dressing

Method

1. Heat the oven to 220°C/200°C fan/gas 7. Put each foil sheet on the work surface shiny side down and lay a baking paper sheet on top. In a bowl, toss the frozen fish with the veg and a pinch of black pepper.
2. Mix the soy, mirin, wine vinegar, and lime zest and juice to make a dressing. Add most to the fish and vegetables, then toss well to coat. 
3. Divide the fish and vegetables equally between the 2 sheets of baking paper, then wrap the paper tightly around the fish and veg to seal them inside. Fold up the foil around the paper and seal to make a parcel. Put the parcels on a baking tray and bake for 16-18 minutes or until piping hot and the fish is cooked.
4. Meanwhile, put a pan of water on a high heat with a steamer basket fitted inside. When the water is boiling, reduce the heat a little and steam the pak choi for 3-4 minutes until tender, then toss with the reserved dressing. Serve the fish parcels with the steamed, dressed pak choi on the side.