Rinse the sabudana pearls with water, until the water runs clear. Sanitize the instant pot thoroughly by cleaning all the parts. Add the sabudana pearls in the instant pot along with water for soaking and soak for about 30 minutes.
After the soaking time is done, set the instant pot on saute mode and let the sabudana simmer for about 3 minutes while stirring frequently. Then press cancel. Now add the milk and saffron to the instant pot and stir well. Set to slow cook mode (medium) for 1 hour. You can use the instant pot lid or a glass lid.
Open the lid and stir the kheer. Add the sugar, cardamom, roasted nuts and raisins. Mix well. Mix well and put on saute mode for 4 mins while stirring frequently.
Turn off the instant pot. Let the kheer cool. This kheer thickens as it cools. Garnish with more saffron and nuts to your liking. This Sabudana Kheer is delicious served hot or chilled.