Gather all your ingredients. If you have an olive salad, you can skip to the next step. If not, combine chopped olives, pickled vegetables, and a drizzle of olive oil in a bowl to create a quick olive salad.
Using your sharp knife, carefully slice the round Italian bread in half horizontally, keeping the top and bottom intact.
Spread half of the olive salad generously over the bottom half of the bread.
Layer the meats on top of the olive salad, starting with the ham, followed by the capicola, Genoa salami, and mortadella.
Place the provolone cheese slices over the meats.
Spread the remaining olive salad over the cheese.
Carefully place the top half of the bread on the sandwich and gently press down to compact the layers slightly.
If you're not serving the sandwich immediately, wrap it in plastic wrap or parchment paper and refrigerate for at least an hour.
