Season the chicken breasts with Cajun seasoning, salt, and pepper. Ensure an even coating over the chicken.
In a large pot, bring salted water to a boil. Add fettuccine and cook according to package instructions until al dente. Reserve 1 cup of pasta water, then drain the rest and set aside.
In a large skillet, heat olive oil over medium-high heat. Once hot, add the seasoned chicken breasts and cook for 6-7 minutes on each side, or until the internal temperature reaches 165°F (75°C). Remove from the skillet and let rest for a few minutes, then slice into strips.
In the same skillet, reduce the heat to medium and add minced garlic. Sauté for about 1 minute until fragrant. Pour in the heavy cream and bring to a simmer. Stir in the Parmesan cheese until melted and smooth.
Add the drained fettuccine to the skillet along with the cherry tomatoes and spinach. Toss everything together, adding reserved pasta water as needed to reach your desired sauce consistency.
Gently mix in the sliced chicken, ensuring it’s well-coated in the creamy sauce. Adjust seasoning with salt and pepper if necessary.
Plate the Chicken Alfredo and garnish with chopped parsley for a fresh touch.
Notes
Adjust seasoning to taste and add more pasta water for a thinner sauce if desired.