Follow these steps to prepare your Creamy Lemon Chicken Pasta:

1. Cook the Pasta: In a large pot of boiling salted water, cook the fettuccine or linguine according to package instructions until al dente. Drain and set aside.

2. Prepare the Chicken: Season the chicken breasts with salt and pepper on both sides.

3. Sauté Chicken: In a large skillet, heat the olive oil over medium-high heat. Add the chicken and cook for about 5-7 minutes on each side or until fully cooked and golden brown. Remove from the skillet and allow to rest before slicing.

4. Sauté Garlic: In the same skillet, add minced garlic. Sauté for 1-2 minutes until fragrant, making sure not to burn it.

5. Deglaze the Pan: Pour in the chicken broth and scrape up any brown bits from the bottom of the skillet.

6. Add Cream and Lemon: Reduce the heat to medium-low, add the heavy cream, lemon zest, and lemon juice. Stir until well combined.

7. Incorporate Cheese: Gradually whisk in the grated Parmesan cheese until the sauce is smooth. Simmer for 3-4 minutes until slightly thickened.

8. Combine Pasta and Sauce: Add the cooked pasta to the sauce, tossing to coat the pasta evenly.

9. Add Spinach: If using, fold in the fresh spinach and cook for an additional 2-3 minutes until wilted.

10. Slice Chicken: Slice the sautéed chicken into strips and lay them over the creamy pasta.

11. Garnish and Serve: Sprinkle with fresh parsley before serving for a touch of color and flavor.

These steps will guide you effortlessly towards creating a delicious dish that everyone will love.