In a medium bowl, combine graham cracker crumbs, melted butter, brown sugar, and salt.
Transfer mixture to a 9-inch pie plate. Press the mixture into the bottom and up the sides of the pan. Bake for 10 to 12 minutes or until fragrant. Let the crust cool completely.
Pour 1 ¼ cups dulce de leche into the crust. Use an offset spatula to spread into an even layer.
Arrange sliced bananas on top of the dulce de leche layer. It’s okay for the banana slices to overlap slightly. I like to make a concentric circle pattern. Sprinkle toffee bites on top. Set aside.
Make the whipped cream. In a cold metal bowl, add the heavy cream, sugar and vanilla. Use an electric mixer to whip the mixture until medium-soft peaks form.
Transfer whipped cream to a piping bag and pipe whipped cream over the pie filling. Refrigerate for 2 hours and up to 48 hours. Garnish with chocolate shavings before serving.
Notes
Store covered in the refrigerator for up to 3 days.