Make the dressing: In a small bowl or mason jar, whisk together the mayonnaise, red wine vinegar, pepperoncini brine, minced garlic, Italian seasoning, kosher salt, and black pepper until smooth and creamy.
To a large bowl, add the chopped romaine, chickpeas, cannellini beans, salami, turkey, bell pepper or roasted red peppers or cherry tomatoes, chopped pepperoncini, Parmesan cheese (if using), and fresh basil.
Pour the creamy grinder dressing over the salad and toss until everything is evenly coated.
Enjoy immediately, or refrigerate for 20–30 minutes to let the flavors meld before serving.