In a small bowl, combine chopped green and black olives, roasted red peppers and capers. Add red wine vinegar, olive oil, oregano and black pepper. Mix well to form a flavorful olive salad.

Use a sharp knife to cut the Italian loaf horizontally into two even halves. Remove some of the soft interior if you prefer less bread thickness. This makes room for the fillings.

Generously spread the prepared olive salad on both cut sides of the bread. Make sure it reaches the edges. This layer adds tangy flavor and moistens the sandwich.

Start layering the meats evenly on the bottom half of the bread. First, place the salami, then mortadella and finally ham. Make sure the slices cover the bread completely for full flavor in each bite.

Place provolone cheese slices evenly over the meat layer. The cheese adds creaminess and balances the salty flavor of the meats and olive salad. You can use more or less cheese based on preference.

If desired, add shredded lettuce and tomato slices on top of the cheese. These add freshness and crunch. They also make the sandwich more colorful and appealing.

Place the top half of the bread over the fillings. Press gently to secure all layers together. This helps the sandwich hold its shape while serving.

Use a sharp knife to cut the sandwich into quarters or halves. Serve immediately on a plate. Enjoy a perfect mix of meats, cheese and olive salad in each bite.