01 - Preheat oven to 400°F. Lightly grease a large baking dish with oil or cooking spray.
02 - Bring a large pot of salted water to a rolling boil. Add the pasta and cook until just al dente according to package directions. Drain well and set aside.
03 - While the pasta cooks, heat olive oil in a large skillet over medium heat. Add the chicken pieces, season with salt and pepper, and sauté for 5 to 6 minutes until golden brown and cooked through. Remove from heat and set aside.
04 - In a large mixing bowl, combine the drained pasta, seared chicken, basil pesto, heavy cream, minced garlic, and chopped sun-dried tomatoes. Toss until every piece is evenly coated in the sauce.
05 - Transfer the pasta mixture into the prepared baking dish, spreading it into an even layer. Scatter the shredded mozzarella and grated Parmesan evenly across the top.
06 - Place in the preheated oven and bake 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.