Banana Cream Pie Parfaits

Name: Banana Cream Pie Parfaits
Ingredients: 2 cups vanilla wafers (crushed); 1/8 cup white sugar; 6 tablespoons butter (melted); 2 cups Almond Milk (I like the unsweetened vanilla kind but you can use any nut or regular milk if you prefer); 3/4 cup heavy cream; 1/2 cup sugar; 3 tablespoons cornstarch; 2 tablespoons all-purpose flour; 1/4 teaspoon kosher salt; 5 large egg yolks; 1/4 cup unsalted butter (cut into 1/2 cubes); 1 vanilla bean (seeds removed); 1 cup heavy cream; ¼ cup powdered sugar; 2 ripe bananas