Boil salted water in a large pot and cook the pasta according to package instructions until al dente.
While the pasta cooks, heat olive oil in a skillet over medium heat.
Add minced garlic to the skillet and sauté for 1-2 minutes until fragrant.
Stir in halved cherry tomatoes and cook for another 3-4 minutes until softened.
Season the mixture with Italian seasoning, salt, and pepper.
Drain the cooked pasta, reserving a bit of the pasta water.
Add the pasta to the skillet with the tomato mixture.
Toss everything together, adding reserved pasta water if needed for moisture.
Add the grilled chicken slices on top and mix gently.
Serve immediately, garnished with fresh basil and grated Parmesan cheese.