Start by bringing a large pot of salted water to a boil. Add the penne pasta and cook according to package instructions until al dente. Once cooked, drain the pasta in a colander and set it aside.
In a large skillet, heat the olive oil over medium heat. Add the diced chicken breast and season with salt and pepper. Cook for about 5-7 minutes, stirring occasionally, until the chicken is browned and cooked through.
Once the chicken is cooked, add the minced garlic to the skillet. Sauté for an additional 1-2 minutes, stirring constantly, until the garlic is fragrant but not burnt.
Pour in the chicken broth and bring it to a simmer. Let it cook for about 3-4 minutes, allowing the flavors to meld together. Then, reduce the heat and stir in the heavy cream, grated Parmesan cheese, and Italian seasoning.
Add the cooked penne pasta to the skillet and toss everything together until the pasta is well coated in the creamy sauce. Cook for a few more minutes to heat through, and adjust the seasoning with more salt and pepper if needed.
Remove from heat and transfer the Creamy Garlic Butter Chicken Pasta to serving plates. Garnish with chopped fresh parsley for a touch of color and freshness. Enjoy while hot!