Take 4 squares of nonstick baking paper that are about 8 cm (3½ inches) longer than the fish fillets.
Place a red mullet fillet on top of 1 of the baking paper squares. Sprinkle with a few julienne of chilli and ginger and a few slices of spring onion, garlic and lime. Drizzle over a little soy sauce and sesame oil.
Fold 1 corner of the paper over the top of the fish, leaving you with a triangular parcel. Starting at 1 corner of the triangle, fold the edges in a couple of times to seal the fish in its own packet. Repeat with the other fish fillets. Place in a preheated oven, 180°C (350°F), Gas Mark 4, for 6–8 minutes, or until the fish is opaque and firm to the touch.