Heat olive oil in a large skillet over medium heat.
Season the chicken breasts with Italian seasoning, sea salt, and black pepper.
Cook for about 8 minutes per side until golden brown and fully cooked.
Allow the chicken to rest for 10 minutes before cutting into bite-sized pieces.
Bring a large pot of generously salted water to a boil.
Cook the rigatoni until al dente according to the package directions.
Drain well and transfer the pasta to a large serving bowl to cool slightly.
In a small bowl, whisk together olive oil, red wine vinegar, Dijon mustard, garlic, sea salt, and black pepper until smooth.
Add tomatoes, roasted red peppers, olives, and capers to the pasta.
Pour the vinaigrette over the mixture and toss until evenly coated.
Fold in the diced chicken and sprinkle with Parmesan cheese.
If serving immediately, add arugula and basil and gently toss. For meal prep, add the greens just before serving to keep them fresh. Enjoy this Mediterranean Chicken Pasta Salad chilled or at room temperature.