Cream powdered sugar, vanilla, and salt with the heavy cream in the bowl of a stand mixer. Beat until the cream mixture holds stiff peaks.

Spread a thin layer of heavy cream mix in a 9x13 pan just to coat the bottom.

Layer 5 graham crackers across the center of the pan, then 2 more,breaking them as needed to fit around the top and bottom edges.

Spread a thick layer of heavy cream mix over grahams and top with a hearty layer of sliced strawberries.

Place graham crackers on top of strawberries, then heavy cream mix, then layer of thinly sliced bananas.

Repeat the graham-strawberries-cream layers 1 more time (3 times total) and you should reach the top of the pan.

Refrigerate for at least 4 hours or overnight until the graham crackers have softened completely.

Top with a few sliced strawberries or whole strawberries if you desired.

Serve chilled.