In a small bowl, whisk together mayonnaise, red wine vinegar, dried oregano, garlic powder, pepperoncini juice, and Parmesan cheese until smooth and creamy. Set aside.

In a large mixing bowl, chop iceberg lettuce into bite-sized pieces. Add assorted deli meats cut into thin strips, cherry tomatoes, diced red onion, chopped Provolone cheese, and sliced pepperoncini.

Gently toss all the salad ingredients together until evenly distributed.

Drizzle the prepared dressing over the salad and gently toss until the ingredients are evenly coated.

Serve immediately for the best texture and freshness, optionally garnishing with additional Parmesan or whole pepperoncini.