Rinse the sabudana well a few times. Next, Place the sabudana in a medium mixing bowl along with the 1.5 cups water, cover, and let stand for 4 hours.
When you are ready to cook, peel, rinse and chop the potatoes into ½ inch cubes. Place them in a microwave safe bowl, add ½ tsp salt, and ½ tbsp oil. Mix well. Cover the potatoes and cook them in the microwave for 3 minutes. Take them out, stir, mix well and cook them again for an additional 2 minutes.
Additionally, if you dont have roasted peanuts, roast the peanuts in the microwave for 1 minute. Take them out, mix them and roast them again for an additional minute. If they still smell raw you can cook them for an additional 30 seconds. Using a grinder, grind the peanuts coarsely for about 5 to 8 seconds. Make sure they are not ground super fine. If you are using roasted peanuts, just grind them directly.
Drain water from the sabudana in a colander. Make sure there is no water residue and it is completely drained. In a mixing bowl, mix together the drained sabudana, 1 tsp salt, potatoes, and crushed roasted peanuts.