Bring a small pot of the water to a low boil, then stir in the oats, blueberries, and cinnamon.
Simmer for 3 minutes, stirring occasionally.
Stir in the oat milk, maple syrup, vanilla, and salt, then heat for another minute over low until warmed.
Spoon the blueberry oatmeal into a bowl, then top with butter, blueberries, and maple syrup.
Add a drizzle of almond butter and a sprinkle of hemp hearts, if you wish.