Prepare the Caramel: In a food processor, blend the dates, peanut butter, milk, and salt until smooth.
Make the Yogurt Cream: In a bowl, mix the strained yogurt, honey, cinnamon, and vanilla until well combined.
Prepare the Bananas: Peel and slice the ripe bananas.
Assemble the Banoffee: In individual cups, layer the granola at the bottom, followed by the caramel, banana slices, and yogurt cream.
Finish and Serve: Top with couverture chocolate and mint leaves before serving.