Bring a large pot of salted water to a boil.
Add the pasta and cook according to the package directions until al dente.
Drain the pasta and rinse it briefly under cool water to stop the cooking process.
Allow the pasta to drain well, then transfer it to a large mixing bowl and let it cool for about 10 minutes.
Chop or shred the cooked chicken into bite-sized pieces.
In a small bowl, whisk together the Caesar dressing, lemon juice, garlic powder, black pepper, and salt.
Pour about three-quarters of the dressing mixture over the cooled pasta.
Toss until the pasta is evenly coated.
Add the chopped chicken and Parmesan cheese, then mix gently.
Fold in the romaine lettuce and cherry tomatoes.
Add any optional vegetables or additional ingredients.
Pour in more Caesar dressing as needed and toss gently until the salad reaches your preferred creaminess.
Cover and refrigerate for about 20 minutes, if desired.
Add the croutons immediately before serving so they remain crunchy.
Garnish with extra Parmesan, parsley, black pepper, and lemon wedges.
Serve chilled or slightly cool.
