Firstly boil some water in a large vessel. When it comes to a boil add the can of condensed milk and let it simmer for around 3-4 hours. (Make sure the vessel isn't covered and make sure that the can is always immersed in water.) Now remove the can from the water and let it cool completely in 3-4 hours.

Now empty the contents of this can in a bowl and keep aside.Actually what you get now is a caramel.

Now whip the cream to stiff peaks in a chilled bowl and keep aside.

Add biscuits to zip lock bag and keep crushing it until it becomes powder or you can do it in a blender. Add the melted butter and mix it. The mixture resembles a wet sand. Add this mixture into a 7"inch pie dish(with a detachable bottom) or a 8" springform cake tin. Put the pie dish or the cake tin in freeze for at least 20 mins.

Take the pie out of fridge and add sliced banana on top and also pour the caramel made from condensed milk on top of the sliced banana and spread it evenly.

Now take whipped cream in a piping bag with a star nozzle and create beautiful designs. Garnish the top with chocolate shavings. Now you can freeze the pie and take it out of the pie dish or tin when you want to serve it.