Gently slice the Italian or French bread horizontally, being careful not to cut all the way through. You want to create a hinge so you can open it like a book.

In a small bowl, whisk together the mayonnaise, yellow mustard, Italian dressing, dried oregano, and garlic powder. This creamy, flavorful base is key!

Generously spread the mayonnaise mixture evenly over the cut surfaces of both the top and bottom halves of the bread. Don't be shy – this adds moisture and flavor to every bite!

On the bottom half of the bread, create layers starting with the ham, then salami, and finally pepperoni. Next, layer on the provolone cheese slices, followed by the mozzarella. This order helps the cheese melt nicely if you choose to toast it later.

Now comes the fresh crunch! Layer the shredded lettuce over the cheese, followed by the tomato slices, red onion, dill pickles, kalamata olives, and banana peppers (if using). Distribute them evenly for the best flavor in every bite.

Sprinkle a pinch of salt and freshly ground black pepper over the vegetables. Carefully close the top half of the bread over the fillings, pressing down gently to secure the sandwich.

Using your bread knife, slice the sub sandwich into your desired portions – usually 4-6 servings. Serve immediately and enjoy every delicious bite!