Cut Italian loaf in half longwise with a serrated knife. Scoop out some of the bread in the top half of the loaf to provide more room for toppings.

Spread mayonnaise on the bottom half of the loaf. Layer the meats and cheese on the bottom portion of the loaf in your preferred order.

Chop the iceberg lettuce, tomatoes, banana peppers, and olives. Add a bed of lettuce to the top half of the hollowed loaf, followed by the chopped vegetables and a drizzle of olive oil, vinegar, and seasoning. Press the two halves together.

Cut the large sandwich into six even pieces. Serve immediately or wrap and store for later.