Step 1: Prepare the Pudding Base

1. In a medium saucepan, whisk together the sugar, flour, and salt.
2. In a separate bowl, whisk the egg yolks and milk until well combined.
3. Gradually add the milk mixture to the dry ingredients in the saucepan, whisking constantly to avoid lumps.
4. Cook the mixture over medium heat, stirring continuously, until it thickens and comes to a gentle boil (about 8-10 minutes).
5. Remove from heat and stir in the butter and vanilla extract. Let the pudding cool slightly.

Step 2: Layer the Vanilla Wafers and Bananas

1. In a large serving dish or trifle bowl, arrange a layer of vanilla wafers at the bottom.
2. Add a layer of sliced bananas on top of the wafers.
3. Pour a portion of the warm pudding over the bananas and wafers, ensuring they are fully covered.
4. Repeat the layers until all ingredients are used, finishing with a layer of pudding on top.

Step 3: Prepare the Topping

• Whipped Cream Option:
  1. In a mixing bowl, beat the heavy whipping cream, powdered sugar, and vanilla extract until stiff peaks form.
  2. Spread the whipped cream evenly over the top layer of pudding.
• Meringue Option:
  1. Preheat the oven to 350°F (175°C).
  2. In a clean mixing bowl, beat the egg whites and cream of tartar until soft peaks form.
  3. Gradually add the sugar and continue beating until stiff peaks form.
  4. Spread the meringue over the pudding, making sure to seal the edges.
  5. Bake for 10-12 minutes or until the meringue is golden brown.

Step 4: Chill the Pudding

1. Cover the pudding with plastic wrap or a lid and refrigerate for at least 4 hours, or overnight, to allow the flavors to meld and the cookies to soften.

Step 5: Serve and Enjoy

1. Once chilled, remove the pudding from the refrigerator.
2. Garnish with additional banana slices or crushed vanilla wafers, if desired.
3. Serve in individual bowls or directly from the dish.