POTATO PAYASAM

I have heard of potato halwa but not about payasam till i saw this video. No one will guess its made of potato.
I Used light brown sugar instead of white sugar.
INGREDIENTS:
Milk-approximately 2 cups
Potato- 2
Brown Sugar-approximately 1 1/2 cup
Ghee-1 tbs
Nut and raisin-few
Cardamom-2
METHOD:
1)Boil , peel and mash potato.
2)Heat a heavy bottom pan and caramelize half of the sugar.
3)Add mashed potato.Mix well with sugar.
4)Add Milk and rest of the sugar and cardamom.
5)Add fried nuts and raisin and serve.
It tastes very good when served cold.