In your jar or container (or a mixing bowl), mash the banana until mostly smooth.
Add the Greek yogurt, cocoa and sea salt and stir well until fully combined.
Stir in the rolled oats and flaxseed until evenly mixed.
If you mixed in a bowl, transfer to your container, cover and let the oatmeal sit in the fridge for at least 4 hours (overnight is best for optimal texture).
In the morning, enjoy your breakfast as you get all ready for your busy day.If the oats are thicker than you would like, you can stir in a couple of tablespoons of milk or water before eating.
