Combine the coconut milk with 1 cup (250ml) water in a jug, then set aside.
Combine the quinoa and a pinch of salt in a saucepan. Add half the coconut milk mixture, or just enough to cover the grains. Bring to the boil, stirring over medium-low heat. Reduce the heat to low and simmer, stirring occasionally, for 20-25 minutes until the grains are tender and the mixture is a porridge consistency, topping up with some of the remaining liquid if it's becoming too thick.
Meanwhile, place the palm or brown sugar, and 1 cup (250ml) water in another saucepan over low heat. Stir to dissolve sugar, then simmer for about 30 minutes until it is thick, syrupy consistency and the mixture has reduced by half.
To serve, pour about 1 tablespoon of syrup in the bottom of each bowl or serving glass, spoon over the porridge, then add a little more syrup. Top with sliced banana and sprinkle with toasted coconut and serve warm.