Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine rolled oats, baking powder, and salt. Mix well and set aside.

In another bowl, combine the milk, maple syrup, and half of the blueberries. Mix until the blueberries are slightly broken down.

Pour the wet ingredients into the dry ingredients and stir gently until combined.

Lightly grease a baking dish and transfer the mixture, spreading it out evenly.

Sprinkle the remaining blueberries over the top and press them gently into the mixture.

Bake for 30 minutes, until the top is golden brown.

Allow to cool for 5 minutes before serving warm.