Heat olive oil in a large pot over medium heat.
Add diced chicken to the pot and season with salt and pepper. Cook until browned, about 5-7 minutes.
Stir in the minced garlic, cooking for 1-2 minutes until fragrant.
Pour in the chicken broth and bring to a boil.
Add the penne pasta and cook according to package instructions, usually about 11-12 minutes.
Once the pasta is al dente, reduce the heat and stir in the heavy cream.
Add the grated Parmesan cheese and mix until melted and creamy.
Taste and adjust seasoning with additional salt and pepper if needed.
Serve hot, garnished with fresh parsley.