1.Place vermicelli in a large heatproof bowl of boiling water, stand until just tender; drain. Rinse under cold water; drain.
2.To make dressing, combine all ingredients in a screw-top jar; shake well.
3.Place measured water, ginger, lemongrass and garlic in a medium frying pan; bring to the boil. Reduce heat; add prawns and salmon separately, cook until just tender. Drain well.
4.Place noodles, dressing, prawns, flaked salmon and remaining ingredients in a medium bowl; toss gently to combine.
Not suitable to freeze. Not suitable to microwave. Cooking time of salmon will vary depending on the thickness of the cut. Have water at a gentle simmer to avoid overcooking prawns.