1.Place each piece of fish on a 30cm square piece of baking paper. Combine onion, garlic, ginger, coriander and chilli in a small bowl. Divide mixture over fish. Combine sesame oil, zest, juice and sugar In a small bowl: spoon over fish. Fold sides of paper over fish, then fold in ends to seal parcels. Place parcels in a bamboo steamer. Cover with a tight-fitting lid or double layer of foil.
2.Quarter-fill a wok with water and bring to the boil. Place bamboo steamer in wok: cook for 8 minutes or until fish flakes when tested with a fork.
3.Cook noodles In a large saucepan of boiling water for 3 minutes or until tender. Drain.
4.Spoon noodles onto vowing plates. Lift fish portions onto noodles: pour juice from parcels over fish. Drizzle with soy sauce. Serve with Asian greens.