Bring a small pot of water to a boil. Pour in sago seeds and lower heat. Let it simmer for around 10 minutes. Stir gently occasionally to prevent the sago pearls from clumping and sticking to the pot.
After 10 minutes of simmering, turn off the heat. The water has turned all starchy now caused by the starch from the sago seeds. You will see that the sago still has a tiny white dot in the middle. The sago is not fully cooked yet.
Keep the pot covered for about 5-10 minutes and let the remaining heat finish cooking the sago. After 10 minutes, open the lid and check. It is fully cooked when the sago is all translucent and has no white in center.
Strain and rinse the sago under cold running water a few times to remove any residual starch. Keep freshly cooked sago in enough water to cover it until ready to use. Best to use within a few days.
Recipe by Souper Diaries at https://souperdiaries.com/how-to-cook-sago-pearls/