Wash chicken pieces and wipe dry.
Put these and cornflour into a paper or plastic bag and shake well to coat chicken well.
Remove and dust off the excess flour and keep aside.
Heat oil in a kadahi.
Add chicken pieces first over high heat then lower the heat and fry till golden and cooked through.
Drain well and keep aside.
In the remaining oil, add sliced onion, ginger and garlic, and stir fry till onion is transparent.
Add chicken, turn around a few times and then add the mixed sauce ingredients.
Stir fry till the sauce thickens a bit and serve hot.
Key Ingredients: chicken, cornflour, vegetable oil, onion, ginger, garlic, soya sauce, vinegar, tomato puree, salt, black pepper