Preheat the oven to 170°C fan forced / 190°C / 375°F.
Combine the oats and milk in an oval baking dish, stir well. Scatter over the blueberries and arrange the sliced banana on top. Leave to soak whilst the oven is heating up.
Bake in the oven for 15-20 minutes until the blueberries and banana are soft, and the top is slightly golden.
Enjoy it whilst it's hot with a drizzle of maple syrup.
Notes
Storage
Blueberry and Banana Baked Oatmeal is best served hot from the oven. If it cools down, simply warm it in the microwave for a few seconds.