To cook the sago, boil a pot of water. Add Sago (3 tablespoon) and boil for 10 minutes. Stir continually to avoid the sago stick to the pot bottom.
Move the pot from fire, set aside for around 15 minutes with the lid covered. Drain sago and rinse well under cold water.
Peel and remove the pit from the Mango (2). Peel and separate sacs from the Pomelo (1/2). Set both aside.
Add Milk (200 milliliter), Coconut Milk (200 milliliter), and Mango into a blender. Blend until smooth. You can add Granulated Sugar (to taste) for extra sweetness. Place the mixture in the fridge for 15 minutes or until chilled.
Pour the smoothie mixture into the serving bowls. Add cooked sago and top with extra mango chunks and pomelo. Serve and enjoy!