Heat oil and fry the onions till it starts to brown slightly add the cleaned chicken and chopped green chillies, cook till all the juices are nearly evaporated.
Next add the grated ginger and garlic and fry for a few minutes. when the chicken is nearly done add the powder and fry for another well add some water and cook till done and most of the water is evaporated.
PS:
Kaloova is a kind of spice i brought from india not sure if you can find it in the west but it is the key to the aroma.