In a pot, bring 4 cups of water to a boil. Add the soaked sago pearls and cook for about 30 minutes, stirring occasionally, until they become translucent.

Once cooked, strain the sago pearls and rinse under cold water to stop the cooking process. Set aside.

In a blender, combine the diced mangoes, coconut milk, sugar, and a pinch of salt. Blend until smooth.

In a mixing bowl, combine the cooked sago pearls with the mango mixture. Stir well to combine.

Chill in the refrigerator for at least 1 hour before serving. Serve cold, garnished with additional mango pieces if desired.