Preheat the oven to 180°C conventional or 160°C fan. Grease or line a small baking dish.
In a bowl, mix the oats, cocoa powder, cinnamon, baking powder, and salt.
In another bowl, mash the ripe banana until smooth.
Add the egg, almond milk, and agave syrup to the banana. Whisk until combined.
Pour the wet mixture into the dry ingredients and stir gently until just combined.
Let the batter rest for 5 minutes so the oats can absorb the liquid.
Fold in the chopped dark chocolate.
Spoon the batter into the prepared baking dish and smooth the top lightly.
Top with sliced strawberries and coconut flakes. Press the toppings in gently.
Bake for 20–25 minutes, or until the centre is set and a skewer comes out with a few moist crumbs.
Cool for 5–10 minutes before slicing and serving.