Fry the sliced onions light pink. Add cumin seeds, chicken, ginger garlic paste and fry till the water released by the chicken dries out. Put in salt chilli powder and turmeric. Add chopped tomatoes, sugar and ¼ cup water. Mix in and cover with a lid. Cook it on high flame for 3-4 minutes. When it starts sizzling, cover and cook on low medium flame until the chicken is tender. It should take approximately 25 minutes. If the chicken is completely tender, taste to check seasoning. This dish needs to finish off with a semi dry consistency. Not a runny gravy neither too dry. Adjust the quantity of water according to how the dish looks, when you take the lid off. If you need to add water, make sure you add boiling water and simmer for 2-3 minutes to blend in flavours. Finally mix in green coriander leave sand green chillies (if using) after switching off the flame.