Preheat oven to 180°C. Line a medium baking dish with baking paper.
In a large bowl, mix the oats, baking powder, cinnamon and salt.
In a separate bowl, whisk together the milk, eggs, maple syrup, vanilla and oil.
Pour the wet ingredients into the oats and stir until well combined.
Gently fold in the blueberries.
Transfer the mixture to the prepared baking dish and scatter over the flaked almonds.
Bake for 35–40 minutes, until set and lightly golden on top.
Allow to cool slightly before slicing and serving.