Ingredients:

2lbs (1kg) finely chopped onions
4 tblsp vegetable oil
2 or 3 garlic cloves, crushed or finely chopped
1 1/2 tsp ginger
1 tsp cinnamon
1 1/2 tsp coriander
3/4 tsp ground cardamon
2 bay leaves
a good pinch of red chili powder or cayenne pepper (which I’ve never used)
1 chicken, cut into pieces (original recipe calls for 6 boneless and skinless fillets weighing 1 3/4lb (800gm) cut into smaller pieces, but I’ve never done that!)
1lb tomatoes, peeled and chopped or a 14oz (400gm) can of chopped tomatoes (to peel tomatoes, soak in boiling water until you can remove skins with your fingers)
2-3 tblsps wine vinegar
2 teaspoons sugar or to taste (I’ve never added the sugar)

Directions: Put the onions in a large pan with the oil and stir fry/cook gently with lid on until onions are soft and golden. This can take up to 1/2 hour. Add the garlic, ginger, spices and bay leaves and stir for 5 minutes. Put in the chicken pieces, season with salt, and saute for 10 minutes, such that they are lightly browned on both sides. Now add the tomatoes and simmer, uncovered for 30 minutes, or 45 minutes to 1 hours if using pieces of a whole chicken. You want most of the excess liqued to evaporate leaving a nice gravy. Finally stir in the vinegar and sugar and cook 10 minutes more. Delicious served with rice.

To see the original source and author of this please go to this URL:
http://www.creativejewishmom.com/2010/09/sweet-sour-chicken-in-onion-sauce-a-delicious-recipe-from-the-baghdadi-jews-of-india.html