Wash the broken wheat thoroughly for 4-5 times. Pressure cook broken wheat with at least 3 of water for 3 whistles on medium heat. Add powdered jaggery and cardamom to the milk. Keep on stirring continuously until the jaggery has melted. Transfer the cooked wheat to the saucepan and mix nicely with the milk. Roast jackfruit, cashews and raisins in ghee and add it to the Payasam. Serve this delicious Payasam hot or cold. This Payasam thickens immediately after preparation.