Creating One-Pan Creamy Penne with Spinach and Italian Sausage is straightforward if you follow these simple steps:

1. Cook the Sausage: In a large skillet, heat the olive oil over medium heat. Add the Italian sausage and cook until browned and cooked through, breaking it apart with a spatula.

2. Add Garlic: Once the sausage is fully cooked, add the minced garlic to the pan. Sauté for about 1 minute until fragrant.

3. Incorporate Pasta: Add the penne pasta to the skillet, along with 4 cups of water. Stir to combine all the ingredients. Bring to a boil.

4. Simmer: Reduce the heat to a simmer and cover the skillet. Cook for 12-15 minutes, stirring occasionally, until the pasta is al dente and most of the liquid has been absorbed.

5. Add Cream and Cheese: Stir in the heavy cream and grated Parmesan cheese. Continue stirring until the cheese melts and the sauce thickens.

6. Add Spinach: Gently fold in the chopped spinach until it wilts and combines with the creamy sauce.

7. Season: Taste the dish and season with salt and pepper as needed.

8. Serve: Remove from heat and let it cool slightly before serving.

Following these straightforward instructions ensures you achieve a creamy, satisfying dish every time.