Put the porridge and coconut milk in a saucepan. Bring to a simmer and cook for 10 minutes over low heat. It should be creamy, so add a little more coconut milk, if needed.
Turn off the heat, stir in the desiccated coconut, then put a lid on and rest for 5 minutes.
Meanwhile, cut the coconut shavings into tiny bits and zest the lime then squeeze the juice out of it.
Stir the lime juice into the porridge together with some agave syrup.
Spoon the porridge into two bowls, divide the fresh coconut pieces between them, then sprinkle some lime zest on top. Drizzle with more agave/maple syrup over them, if you like is extra sweet.