Take ½ cup sago in a bowl. Rinse it well first then add water till immersing level. Do not add more water say ¼ cup or little more would be enough.
Soak it for 1 hour.
After one hour it should fluffy like this. Set it aside.
To a pot add 3 cups water and let it boil.
Add sago and let it cook in medium flame.
Cook until its transparent. It takes 10-12 minutes depends on the sago variety.
Transfer it to a strainer. Rinse with water first to avoid overcooking. Strain and set aside.
Take 2 medium sized mangoes chopped roughly along with 3 tablespoon sugar and ½ cup milk.
Blend to a fine puree. This puree will be around 1 and ½ cups.
Add ¼ cup condensed milk to it.
Add cooked sago and ½ cup milk.
Mix it until well blended. Add more milk if needed to adjust the consistency.
Chill it and spoon it in dessert bowls, garnish with chopped mangoes.
Serve chilled!