Heat oil, add mustard seeds and whole red chillies. When the mustard starts spluttering, add the jhinge.
Add the sugar, salt and ginger paste and cook on a moderate flame till the water released by the jhinge has almost dried up. Add the green chillies.
Lower the flame and slowly add the milk. (Be careful that the milk doesnt curdle, you might want to add a pinch of gram flour to the milk to prevent it from splitting).
Cook for another 10 minutes.
Check that the sugar and salt are just right, add the ghee and serve with steamed rice.