In a large pot, bring 9 cups of water to a rolling boil.

Add the sago to the boiling water, continuously stir for 10 minutes to avoid clumping.

After 10 minutes, take the sago off heat. Place a lid on the pot and let sit for 4 minutes.

Add ¾ of the mango, coconut milk, and condensed milk to a blender. Blend until smooth.

Rinse sago under cold water, to get rid of the goopy texture. Add to a large bowl.

Let the mango mix and sage chill separately in the fridge for a few hours.

When ready to serve, fold the ingredients together.

Serve in a glass and top with the leftover mango.