Combine all salad ingredients in a bowl the day before you want to make your sandwich.
- Cut large circle on top of bread and take out filling. Reserve cut out circle. This will top your sandwich.
- Spread mayonnaise and olive salad on each side of the bread.
- Layer mozzarella, provolone, mortadella, smoked ham, capicola, and salami. Add another layer of olive salad and layer cheese and meat until you reach the top.
- Add iceberg lettuce for some crunch.