In a large pot, boil salted water and cook the fettuccine according to package instructions until al dente. Drain and set aside.
In a mixing bowl, toss the sliced chicken breasts with Cajun seasoning, ensuring they are evenly coated.
In a large skillet, heat the olive oil over medium-high heat. Add the seasoned chicken to the skillet and cook for 5-7 minutes, turning occasionally, until the chicken is cooked through and no longer pink. Remove the chicken from the skillet and set aside.
In the same skillet, add the diced onion and sliced bell pepper. Sauté for about 3-4 minutes until softened. Add minced garlic and cook for an additional 1 minute, stirring frequently.
Pour in the chicken broth and heavy cream, stirring to combine. Bring the mixture to a simmer and allow it to thicken slightly (about 3-5 minutes).
Return the cooked chicken to the skillet along with the cherry tomatoes and spinach leaves. Stir well to combine and cook for an additional 2-3 minutes until the spinach wilts and the tomatoes are warmed through.
Add the cooked fettuccine to the skillet, gently tossing everything together to coat the pasta in the creamy sauce. Season with salt and pepper to taste.
Divide the creamy Cajun chicken pasta among plates. Garnish with freshly chopped parsley and a sprinkle of grated Parmesan cheese.
Notes
Garnish with fresh parsley and serve with grated Parmesan cheese.