Preheat oven to 350°F (175°C).** Lightly grease a 9-inch round tart or pie pan.
Combine the cookie crumbs and butter until thoroughly combined. Press the mixture evenly into the bottom and up the sides of the prepared pan.
Bake for 12 minutes. Set aside to cool completely.
To make the filling:
Arrange the sliced bananas in the bottom of the cooled crust.
Using an electric mixer on medium speed, beat the cream cheese, brown sugar, vanilla, and cinnamon until thoroughly combined and smooth.
In a separate bowl, use an electric mixer with a whisk attachment to whip the cream until soft peaks form.
Fold about a third of the whipped cream into the cream cheese mixture. Then gently fold in the remaining whipped cream.
Spread the filling evenly on top of the bananas in the crust. Top with toasted nuts. Refrigerate at least 4 hours before serving.
Notes
*I make a single layer of bananas in the bottom of the crust, but feel free to add more if you like.
**I recommend the short oven time for the crust to help it hold together a bit better. But if you prefer not to bake the crust, you may chill it for about 30 minutes after pressing it into the pan.