Aloo ka halwa is a perfect FOOD FOR FASTING...only three main ingredients make this halwa perfect for Prasad or nevedyam since we are not using any sort of flour in it you can count it in gluten free recipe also.
Stir continuously as it tends to stick to the bottom a little. Add milk and powdered sugar and mix well.
Cook till the sugar dissolves completely and the halwa starts leaving ghee. (At this stage you can drain out ghee in a bowl, can consume it later for some other dish) Add green cardamom powder and nuts and mix well. Serve warm.