Add 6 whisked egg yolks, ¾ cup of sugar, flour, milk, and salt to a medium-size saucepot and cook over low heat for about 12-15 minutes while constantly stirring until it becomes very thick.
Once it’s cool slowly add the custard into a stand mixer with the whipped cream recipe and mix on low speed with the whisk attachment until completely combined.
Evenly spread 1/3 of the whipped cream custard to the bottom of a deep 13×9 casserole pan and then layer on the wafers and bananas followed up by adding on another 1/3 of the whipped cream custard.