Step 1: Preheat the Oven

1. Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish lightly with olive oil or non-stick spray and set it aside.

Step 2: Cook the Penne

2. Bring a large pot of salted water to a boil. Add the penne and cook until al dente, following the package instructions. Drain the pasta and set it aside.

Step 3: Prepare the Alfredo Sauce

3. In a large saucepan, melt the butter over medium heat. Add the minced garlic and sauté for about 1-2 minutes until fragrant, but not browned.
4. Pour in the heavy cream and stir well to combine. Simmer gently for about 5-7 minutes, stirring frequently, until the sauce thickens slightly.
5. Gradually whisk in the Parmesan cheese until the sauce becomes smooth and creamy. Season with ground nutmeg, salt, and freshly ground black pepper. Remove from heat and set aside.

Step 4: Combine the Pasta and Sauce

6. In a large mixing bowl, combine the cooked penne pasta with the Alfredo sauce. Toss until the pasta is evenly coated.

Step 5: Assemble the Pasta Bake

7. Spread half of the pasta mixture into the prepared baking dish.
8. Dollop spoonfuls of ricotta cheese over the pasta layer. Sprinkle with half of the shredded mozzarella cheese.
9. Add the remaining pasta mixture on top. Sprinkle the remaining mozzarella cheese and finish with a generous layer of grated Parmesan cheese. If using, sprinkle dried oregano, basil, and red pepper flakes over the top for added flavor.

Step 6: Bake

10. Cover the baking dish with aluminum foil and bake in the preheated oven for 20 minutes. Then, remove the foil and bake for an additional 15-20 minutes, or until the top is golden brown and bubbly.

Step 7: Garnish and Serve

11. Remove the dish from the oven and let it cool for 5 minutes before serving. Garnish with chopped fresh parsley, if desired.