Preheat the oven to 350°F - 180°C.
In a bowl, mix the oats, almond flour, flax seeds, and salt.
Add the milk and maple syrup.
Cut the banana in small cubes, and mix it with the rest of the ingredients, along with the chocolate chips.
Pour the batter in four ramekins.
Dig a small hole in the center with a spoon, and put a teaspoon of peanut butter into it.
Bake for 20 minutes, and allow to cool down for 10 minutes before eating.