Follow these simple steps to create your No Bake Banana Split Casserole:

1. Prepare the Pudding: In a mixing bowl, whisk together the vanilla pudding mix and milk until well combined. Let it sit for about 5 minutes to thicken.
2. Layer the Base: In a 9×13 inch dish, spread a layer of crushed pineapple evenly on the bottom.
3. Add the Pudding: Pour the prepared vanilla pudding over the pineapple layer, making sure it covers it fully.
4. Slice Bananas: Next, evenly distribute the sliced bananas on top of the pudding.
5. Incorporate Whipped Topping: Spread the whipped topping over the bananas, creating a smooth layer.
6. Add Strawberries: Sprinkle the chopped strawberries evenly on top of the whipped topping.
7. Add Optional Walnuts: If using walnuts, sprinkle them over the strawberries for added texture and flavor.
8. Drizzle Chocolate Syrup: Generously drizzle chocolate syrup over the entire casserole.
9. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours, or overnight. This chilling process allows the flavors to meld beautifully.
10. Garnish and Serve: Once chilled, garnish with maraschino cherries before serving.

There you have it! A simple and delightful No Bake Banana Split Casserole that will impress everyone.