Via: Dan Jones
Set aside a 15g chunk of chocolate to make shavings. Chop the rest of the chocolate into small pieces (by hand, or in a food processor) and tip into a bowl. Heat half of the cream to simmering point (in a pan or in the microwave) and pour over the chopped chocolate. Leave for 1 minute, then stir until smooth.
Spoon the peanut butter into a mixing bowl with the sugar and gradually beat in the rest of the cream until smooth and slightly thickened.
Divide the peanut butter cream between 8 small glasses, level, then pour the slightly cooled chocolate mixture on top. Cover and chill until set (around 1 hour).
To serve, top each glass with some sliced banana, a spoonful of salted caramel sauce and the roughly chopped peanuts. Grate over the reserved chocolate just before serving.