Preheat your oven to 375°F / 190°C. Lightly grease an 8x8-inch (20x20 cm) glass baking dish.
In a medium bowl, beat the egg until it's light and frothy.
Whisk in the coconut milk, honey, salt, and cinnamon until well combined.
In a separate large bowl, toss the rolled oats with the brown sugar.
Pour the wet coconut milk mixture over the oats and stir until everything is evenly coated. Gently fold in the blueberries and sliced almonds.
Pour the oatmeal mixture into your prepared baking dish and spread it into an even layer.
Sprinkle the top with a few more blueberries and almonds.
Bake for 25 to 30 minutes, or until the top is lightly golden and the center is set.
Let it cool for a few minutes before serving.
Serve warm or at room temperature, drizzled with a little extra honey if desired.