Add flour to a large mixing bowl then make a well in the centre.
Pour milk into a jug and then whisk in the eggs, then slowly pour the milk mixture into the flour whisking as you go until it becomes a silky smooth batter.
Refrigerate for a half-hour before cooking the crepes.
Melt about 1/2 a teaspoon of butter on a pan over medium heat. Pour about 80ml (1/3 cup) of the batter onto the pan and tilt the pan so that the batter spreads over the base.
Cook for about 2 minutes until the underneath is golden then flip over and cook for another minute until it is cooked through and both sides and golden.
To make the filling, add the yogurt and banana to a bowl and mash until it is fully combined and a smooth sauce.
Spread a heaped tablespoon of the yogurt over each crepe, then add a few berries and rollup.
To serve, drizzle over a little peanut butter and sprinkle a few extra berries.