01 - Preheat oven to 400°F. Lightly grease a large baking dish with cooking spray or butter.
02 - Bring a large pot of salted water to a rolling boil. Add pasta and cook until just al dente according to package directions. Drain well and set aside.
03 - Heat olive oil in a large skillet over medium heat. Season chicken pieces with salt and pepper, then add to the skillet. Sauté for 5 to 6 minutes, turning occasionally, until golden brown and cooked through to an internal temperature of 165°F. Remove from heat and set aside.
04 - In a large mixing bowl, toss together the drained pasta, cooked chicken, basil pesto, heavy cream, minced garlic, and sun-dried tomatoes until evenly coated.
05 - Transfer the pasta mixture to the prepared baking dish, spreading it into an even layer. Sprinkle shredded mozzarella and grated Parmesan evenly over the top.
06 - Bake in the preheated oven for 20 minutes, or until the cheese is melted, bubbly, and golden on top.
07 - Remove from the oven and let rest for 5 minutes before serving. Garnish with fresh basil leaves if desired.