First, add jaggery with 1/4 cup water to a pan and heat until the jaggery dissolves completely. Strain the jaggery syrup to remove impurities and keep it aside.
Heat a pan and dry roast the moong dal lightly until aromatic. Do not over roast. Switch off and allow it to cool slightly.
Wash the raw rice and roasted moong dal together. Soak them in enough water for 30 minutes.
Transfer the soaked rice and dal to a pressure cooker. Add required water and pressure cook for 4 whistles.
Allow the pressure to release naturally. Open the cooker and mash the cooked rice and dal well to get a soft, mushy texture.
Add the prepared jaggery syrup and cardamom powder to the mashed mixture. Mix well, and cook on low flame, stirring continuously.
Add 1tbsp of ghee ,cook until the sakkarai pongal thickens slightly and comes together.
Heat 1 tablespoon ghee in a small pan. Fry the cashews and raisins until golden.
Add the fried cashews, raisins, and remaining ghee to the pongal. Mix gently.
Traditional sakkarai pongal is ready to serve.