Creating One-Pan Creamy Penne with Spinach and Italian Sausage is straightforward. Follow these simple steps for a delicious outcome:

1. Cook the Sausage: Heat olive oil in a large skillet over medium heat. Add the Italian sausage and cook until browned, breaking it apart with a spatula. This should take about 5-7 minutes.

2. Sauté Onions and Garlic: Add the diced onion and minced garlic to the skillet. Sauté until the onions become translucent, approximately 3-4 minutes.

3. Combine Pasta and Broth: Add the penne pasta to the skillet. Pour in the chicken broth and bring to a gentle boil. Reduce the heat to a simmer.

4. Add Cream and Seasoning: Once the pasta has been simmering for about 10 minutes, stir in the heavy cream and Italian seasoning. Continue to cook until the pasta is al dente and the mixture thickens a bit.

5. Toss in Spinach: Add the fresh spinach and cook until wilted, about 2-3 minutes.

6. Incorporate Cheese: Remove the skillet from heat and stir in the grated Parmesan cheese until melted and creamy.

7. Season to Taste: Adjust the seasoning with salt and pepper according to your liking.

8. Serve: Garnish the dish with fresh chopped parsley before serving for a pop of color and flavor.

These steps will guide you through the cooking process, helping you present a beautifully creamy dish of penne pasta.