Your first step can be done way ahead of time (at least hours but can be as much as months before). Remove the label on the condensed milk and submerge the unopened can in pot of water. Cover and boil for 2.5 hours. Warning: Be sure to keep the can covered by water at all times!! You just made toffee!!     To make the crust (*You can skip this step entirely by buying a ready made graham cracker crust.) Grind up digestive cookies/ graham crackers in food processor. Melt stick of butter in microwave and pour into crumb mixture. Blend until you have a moist sand mixture. Smooth wet crumbs into pie plate to make a crust. Bake at 350F for 10 minutes. Set aside to cool. To make whipped cream (*You can skip this step entirely by using cool whip. ) Whip cold cream and vanilla on high until whipped Set aside to b Now its time to bring it all together. Cut up bananas into slices and lay into your crust
Open toffee can, mix with knife until smooth, pour on bananas.

Spread whipped cream over the whole mess