1.In a bowl, combine rice flour, baking powder, bicarbonate of soda and chilli. Season to taste. Gradually add water and juice, stirring until smooth.
2.Heat enough oil to deep-fry in a large saucepan on medium, until a small droplet of batter sizzles as soon as it is added.
3.Dust chicken in extra flour, shaking off excess. Working in two batches, dip chicken into batter, wiping off excess. Lower into oil and cook 5-6 minutes turning, until golden and crisp. Drain on paper towel. Season.
4.Heat extra oil in a large wok on high. Stir-fry vegetables 1-2 minutes. Add wine and stir-fry 1-2 minutes, until just tender. Slice chicken. Serve with vegetables.