In a bowl add in 1 cup of sabudana. Wash it for 3 or 4 times till you get clear water to remove all the starch. Next, add in water such that the sabudana is fully soaked and allow it to soak overnight.
In the morning if you see, the water will be absorbed complete and the sago will be soft. If you press it between your fingers it will mash easily.
Heat a pan with oil, Once its hot add in the Cumin Seeds, Let it splutter, and then add 2 green chillies, Sauté for few secs and add curry leaves if adding. Next, add in the boiled potatoes. You can mash or chop into small pieces and add to the khichdi. Sauté for a min.
Now add in the soaked sabudana, it will be soft by now. Add and mix well.
Add in the roasted peanuts, required Salt, and mix well. Now add in a tbsp of milk. Cover and cook for a minute and then open and stir everything. Don’t cover for more time as the sabudana might stick to each other.
Next add in Sugar, Chopped Coriander leaves mix well saute for few secs and then switch off the flame.
Finally garnish with lemon juice and serve hot with Chai.