Preheat the oven to 350°F (175°C).
Mash the banana in a bowl and whisk in the almond milk, almond butter, maple syrup, cinnamon, and vanilla extract.
Stir in the rolled oats and a pinch of salt, if using.
Fold in the cubed bread and let it soak for a few minutes.
Pour the mixture into a greased ramekin.
Bake for 18-20 minutes, until set and golden on top.
Top with additional banana slices, nuts, or berries before serving.