Add the melted ghee first to the slow cooker. Add the tapioca pearls followed by milk and water. Set it on low for 4 hours.
After 3 hours and 45 minutes, stir. The sago pearls would have cooked beautifully.
Add the saffron, cardamom powder, and condensed milk. Stir and continue cooking for another 15 minutes.
Give a stir, transfer to serving bowl.
Garnish with pistachios. Serve hot, warm, or chilled.