bring coconut milk mixture to boil, let cool to room temperature (can be chilled as well)
mix flour and water, until pliable
bring water, sugar, leaf and salt to boil, for 5 mins in medium high, discard leaf
make balls of flour paste and drop them right into boiling syrup
once balls are floating, stir in cornstarch solution to thicken
serve porridge with (chilled) coconut milk