Rinse the sago pearls well with water till the water runs clear. This helps get rid of the starch.
Place the washed sabudana in a large bowl and add water and salt to it. Leave aside for 2 hours.
After 2 hours you’ll notice that the sabudana has absorbed all the water. Transfer the sabudana into colander to drain out any excess water.
Heat about 2 tbsp oil in a kadai over medium heat. Toss in the small, diced potatoes and fry for 2-3 minutes, until the potatoes turn a golden brown. Remove with a slotted spoon and keep aside.
Next add the raw peanuts into the pan and fry till crisp. Remove and set aside.
Now toss in the cumin seeds and allow to sizzle for 1-2 seconds.
Then add the curry leaves and slit green chillies. Saute for a few seconds.
Now lower the flame and put in the drained sabudana. Mix gently till well combined and pearls become slightly translucent. Do not overcook or else it will turn mushy.
Add the roasted peanuts and potatoes to the sabudana. Combine well.
Switch off the flame. Sprinkle lemon juice and toss well. Garnish with chopped coriander.
Serve Sago Khichri with chilled yogurt.