Wash the potatoes and cut into the small pieces (slices).
Take 2 cup water in the pan and add the potatoes and sago in the water and keep it for stirring till potato become soft.
Now add the jaggery into it.
Using water extort 3 cup of coconut milk and then add into the potatoes.
After adding coconut to potatoes keep it for stirring for 3-5 minutes more.
Include the salt as per taste and also the cardamom powder
Now again stir it for a minute and remove from the gas
Serve it hot.