Wash the moon dhal, add 2 cups of water and cook on a medium flame. In about 15 minutes the dhal would be cooked.
In the meantime, boil a cup of milk and let it cool.
At this stage add the grated jaggery, crushed cardamom. Continue cooking on a medium flame till all the jaggery is dissolved and mixture has a creamy consistency. Add the cool milk and switch off the flame.
Heat ghee in a pan. Fry the cashews and raisins and add it to the payasam.
Serve hot, warm, or chilled.