In a bowl or jar, put the oat flakes, coconut flakes, and sweetener. Mix. Add coconut milk, a few drops of vanilla flavoring, and optionally some water (adjust the amount to cover the dry ingredients). Mix thoroughly until all the ingredients are well combined.

Cover the container with plastic wrap or close it and refrigerate for several hours, preferably overnight. The flakes will swell during this time, and the flavors will blend well.

The oatmeal is ready to eat after taking it out of the refrigerator. Eat it cold or warmed up.