Asian-style dipping sauce
1.Place rice flour, 1 cup of the cornflour and soda in medium bowl; stir until combined (mixture should be lumpy). Cover; stand 30 minutes.
2.Heat oil in wok. Coat fish and vegetables in remaining cornflour; shake off excess. Dip fish and vegetables in batter; deep-fry, in batches, until browned lightly and crisp. Drain on absorbent paper.
3.To make asian-style dipping sauce; combine ingredients in screw-top jar; shake well.
4.Serve tempura immediately with dipping sauce.