Blitz the cottage cheese in a blender or food processor until completely smooth.
Add the banana, cocoa, vanilla and most of the raspberries (save some for the top) and blitz again until it's thick, creamy and a deep raspberry-chocolate colour.
Sweeten to taste if you want it.
Stir the chia seeds through by hand.
Spoon into glasses or ramekins, cover, and set in the fridge overnight (or at least 4 hours) until thick.
Top with fresh raspberries.
