In a medium saucepan, bring the water to a boil.
Gradually add the sago starch while stirring continuously to prevent lumps.
Cook over medium heat, stirring constantly, until the mixture becomes thick and translucent. This usually takes about 10-15 minutes.
Once cooked, remove from heat and let it sit covered for a few minutes.
In a small bowl, mix together tamarind paste, soy sauce, chili sauce, fish sauce, sugar, and water.
Stir until the sugar is dissolved and the sauce is well combined.
Scoop out portions of the ambuyat onto plates or serving bowls.
Enjoy your meal!