Follow these simple steps to create your Ultimate Creamy Garlic Parmesan Chicken Pasta:

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

2. Sauté Chicken: In a large skillet, heat olive oil over medium heat. Add the chicken pieces, seasoning with salt and pepper. Cook for 5-7 minutes until they are browned and cooked through. Remove the chicken from the skillet and set it aside.

3. Prepare the Sauce: In the same skillet, add minced garlic and cook for about 1 minute until fragrant. Be careful not to burn it.

4. Add Cream: Pour in the heavy cream and stir well. Bring to a gentle simmer and allow it to thicken slightly for about 2-3 minutes.

5. Incorporate Cheese: Gradually whisk in the grated Parmesan cheese and garlic powder until melted and combined. If the sauce is too thick, use the reserved pasta water to adjust the consistency to your liking.

6. Combine Everything: Add the cooked chicken back into the skillet along with the cooked fettuccine. Toss everything together until the pasta is evenly coated with the creamy sauce.

7. Final Seasoning: Taste and adjust seasoning with more salt and pepper if needed. If using, stir in spinach or sun-dried tomatoes until spinach wilts.

8. Garnish: Remove from heat and garnish with chopped fresh parsley before serving.

9. Serve Immediately: This dish is best enjoyed fresh, so serve it right away while the pasta is creamy and hot.