Cook the Pasta: Bring a large pot of salted water to a boil. Cook the rotini according to the package directions until al dente. Drain well and rinse under cold water to stop the cooking process. Set aside and allow the pasta to cool completely.
Prepare the Grinder Ingredients: While the pasta is cooling, cut the salami, pepperoni, and ham into small bite-size pieces. Cube the provolone cheese, halve the cherry tomatoes, thinly slice the red onion, slice the banana peppers, and slice the black olives. Set the prepared ingredients aside.
Make the Creamy Grinder Dressing: In a small bowl, combine the mayonnaise, red wine vinegar, pepperoncini brine, Dijon mustard, olive oil, Italian seasoning, garlic powder, crushed red pepper flakes, black pepper, salt, and Parmesan cheese. Whisk until the dressing is smooth and creamy. Taste and adjust the seasoning if needed.
Build the Pasta Salad: Add the cooled rotini to a large mixing bowl. Add the salami, pepperoni, ham, provolone cheese, cherry tomatoes, red onion, banana peppers, and black olives. Pour the creamy grinder dressing over the ingredients and gently toss until everything is evenly coated.
Add the Crisp Lettuce: Add the finely shredded iceberg lettuce and fresh parsley to the pasta salad. Gently fold everything together, being careful not to crush the vegetables. Adding the lettuce at this stage helps keep it fresh and crisp.
Chill and Serve: Cover the pasta salad and refrigerate for about 30 minutes to allow the flavors to blend. Before serving, give it a gentle toss and taste for seasoning. Add a little extra dressing, Parmesan, black pepper, or pepperoncini brine if desired. Serve chilled.