Soak 1/2 cup small tapioca pearls in water for 10 minutes
Bring a pot of water to a boil
Add the tapioca pearls and cook until translucent, stirring occasionally
Drain and rinse the cooked pearls under cold water
Peel and dice 2 ripe mangoes
Blend half of the mango pieces with 1 to 2 cups coconut milk or evaporated milk
Add sugar to taste
Mix the cooked tapioca pearls with the mango mixture
Fold in the remaining mango pieces
Chill before serving
Serve cold