Cook rotini pasta per package directions. Drain and rinse with cold water, then set pasta aside.
In a large bowl, add cooled pasta, Italian salami, green bell pepper, red bell pepper, red onion, grape tomatoes, mozzarella, black olives, parmesan cheese, Italian salad dressing, Italian seasoning, salt, and pepper to taste. Gently toss all ingredients together until thoroughly mixed.
Cover bowl and chill in the refrigerator for at least 2 hours.