Preheat your oven to 350°F (175°C).
Cook the penne pasta according to package instructions until al dente, drain, and set aside.
In a large skillet, melt the butter over medium heat and sauté the minced garlic until fragrant, about 1-2 minutes.
Pour in the heavy cream, and bring to a gentle simmer, stirring occasionally.
Add the Parmesan cheese and Italian herbs, stirring until melted and combined, then season with salt and pepper to taste.
In a large baking dish, combine the cooked penne with the Alfredo sauce, mixing well to ensure every piece of pasta is coated.
Sprinkle shredded mozzarella cheese over the top of the pasta mixture.
Bake in the preheated oven for 20-25 minutes, or until the cheese is bubbly and golden brown.
Remove from the oven and let it cool for a few minutes before serving, garnishing with extra Parmesan if desired.