Add the milk and the water in a small saucepan and bring it to a boil.
Once boiling, drop the temperature down to a gentle simmer and add the oats. Simmer for 5 minutes, stirring here and there.
Then shut of the heat and move the pot off the burner. Cover and let it rest for 5 minutes.
Add the cinnamon and nutmeg and stir to combine.
Transfer the oats to a bowl, top it up with the mango and Brazil nuts, and drizzle with maple syrup. Sprinkle additional cinnamon and add the coconut flakes.