Bring a large pot of salted water to a rolling boil over high heat. Add rotini pasta and cook according to package instructions, about 10-11 minutes, or until al dente. Drain and rinse under cold water.

In a large mixing bowl, combine Italian dressing, freshly squeezed lemon juice, and grated Parmesan cheese. Add in chopped parsley, garlic powder, kosher salt, black pepper, and onion powder. Whisk until well combined.

Carefully add cooled rotini pasta to the dressing mixture. Gently toss the pasta to coat evenly with the zesty dressing.

Transfer the pasta salad to an airtight container and refrigerate for at least 2 hours before serving for the best flavor.