Take a wok. Add oil to it. When it is hot add kalonji seeds, bay leaves and dry red chillies to it. Fry for few seconds.

Now add tomatoes to it and let it cook for 2 mins now add sugar and jaggery to it. Once sugar and jaggery is dissolved in it then cook it till it becomes thick in consistency in medium flame. Finally add tamarind juice and salt to it.

It can be served with roti, paratha, poori or rice