Prepare 4 glasses of water equivalent to 800 ml, add all ingredients except brown sugar. Stir until smooth, then add coconut milk and stir until completely smooth.
Turn on the heat, then cook over medium heat until thick and bursting.
The porridge has become thick and bubbly, which is a sign that it is cooked, so remove it and set it aside.
Prepare a pan, add 1 glass of water and brown sugar, boil until boiling and the sugar melts. Use medium heat.
The sugar has melted, turn off the heat and set aside.