1. Bake pie crust empty and set aside.
2. Put a can of condensed milk into a saucepan with boiling water. Simmer for 3 hours to caramelize. Pour water in pan if required.
3. Pour caramelized condensed milk in pie crust.
4. Peel, and scrape banana. Cut it into slices or any way you like. Lay it over condensed milk over pie crust.
5. Whip cream until soft peaks form. Spread whipped cream on top of banana in pie crust.
6. Sprinkle espresso on top and pop it refrigerator to chill.