Bring 3 cups of water to a boil and pour in the sago pearls and lower the heat. Let it simmer for around 10 minutes.
Stir occasionally to prevent the sago pearls from clumping and sticking to the pot.
After 10 minutes of simmering, turn off the heat. The sago still has a tiny white dot in the middle and is not fully cooked yet.
Keep the pot covered for about 5-10 minutes and let the remaining heat finish cooking the sago.
Strain and rinse the sago under cold running water a few times to remove any residual starch.
Mix the cooked sago pearls with Coconut milk, condensed milk and the heaped mango puree. You can add in vanilla essense if needed.
Refrigerate for a min of 2 hrs.
Mango Sago pudding is ready to serve. This quantity makes 2 servings.
Garnish with mango chunks and pistachio slices.