Bring a large pot of salted water to a boil. Add the pasta and cook according to the package instructions until al dente. Drain, rinse with cold water to stop the cooking process, and set aside to cool.
Season the chicken breasts with olive oil, salt, pepper, garlic powder, and lemon juice. Heat a grill pan over medium-high heat and cook the chicken for 5-6 minutes per side until golden brown and fully cooked. Let it rest for a few minutes before slicing into thin strips.
In a large bowl, combine the cooked pasta, chopped romaine lettuce, grilled chicken, and croutons. Pour in the Caesar dressing and toss gently to coat all the ingredients evenly.
Sprinkle grated Parmesan cheese over the salad before serving. Enjoy immediately, or refrigerate for a couple of hours to let the flavors meld.