PROCEDURE
Cook noodles in the boiling water for 3 minutes on HIGH.
Leave to stand 5 minutes, covered, while preparing the sauce
Combine the sauce ingredients in a deep bowl, stirring well to mix the cornstarch
Cook to 2- 3 minutes until the sauce thickens and clears.
Add the onions and crab and cook 3 seconds on HIGH.
Drain the noodles well and toss with the sauce to serve.