Line the base of the tin with baking paper. Place the butter in a bowl and, using a wooden spoon, beat in the sugar and salt. Add the eggs one at a time and continue to beat until the mixture becomes lighter in colour.
Crush the bananas with a fork, stir in the lemon juice, add, mix. Mix in the flour, baking powder and muesli along with the milk, transfer to the prepared tin.
Spread the muesli over the cake mixture, top with knobs of butter, sprinkle with sugar.
Approx. 40 mins. in the centre of an oven preheated to 180°C. Remove, allow to cool slightly, remove the tin frame, slide the cake onto a cooling rack,dust with icing sugar.