The boutique commercial firm said it is extremely proud to see one of its former lawyers take out the title of the hugely popular reality television series.

"A lot of people within Kelly & Co have been glued to their television screens over the past few weeks cheering Adam on," said the firm's chief executive officer Stuart Price.

"We were absolutely thrilled when he won. It is always good to see a South Australian win a national competition, but when you know them personally it is even more special."

Liaw, who resigned from his job as a media lawyer at the Walt Disney Company in Tokyo to take his chances in the competition, beat fellow South Australian Callum Hann in a spectacular demonstration of just what he can do in the kitchen.

"We're so happy for Adam to have achieved such success in a field for which he has such a passion and flair," said Price.

Liaw worked in Kelly & Co's intellectual property group for almost four years before moving to Japan and even then possessed the traits which have now propelled him into the culinary limelight.

"Adam was a very popular member of our team. He has an intelligence and creative energy that impresses all that meet him," said partner and former colleague Peter Campbell.

"We wish him every future success."