Cook rotini pasta in salted water until al dente. Drain and transfer to a large serving bowl.
While still warm, toss the pasta with half of the Italian dressing.
Add salami, pepperoni, cherry tomatoes, olives, bell peppers, red onion, pepperoncini, and mozzarella pearls.
Toss everything together until evenly combined.
Cover and refrigerate for at least 30 minutes (or up to 24 hours).
Before serving, toss with remaining dressing.
Garnish with fresh parsley and Parmesan.
Serve chilled and enjoy!