Heat ghee in a pan and roast the cashews till they change color slightly. Transfer it over a plate and add jaggery plus half cup of water. Let the jaggery dissolve in water, then strain it to remove the impurities.
Next in a mixer add the soaked dates and ground coarsely. While grinding, you can use the water that is used for soaking.
Heat a pan with dates puree and saute till the raw smell subsides. Then include the jaggery syrup of step 1 and let the dates cook for few more minutes.
Dates paste has cooked well in jaggery now, so add the second extract coconut milk. It will make the payasa very thin.
Mix rice powder in 2 tea spoon of water and make paste. Add this paste to the payasa so that it turns slightly thick. Continue cooking till the rice powder gets cooked. Finally include second extract coconut milk and bring it to boil.
Sprinkle cardamom powder and garnish the payasa with roasted cashews. Dates payasa is ready to serve.