Cook the Spaghetti: Bring a large pot of salted water to a boil. Add the spaghetti and cook according to package instructions until al dente. Drain and set aside.
Sauté the Chicken: In a large skillet, heat the olive oil over medium-high heat. Add the cubed chicken and season with Cajun seasoning, salt, and pepper. Cook until the chicken is browned and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set aside.
Sauté the Vegetables: In the same skillet, add the diced onion, garlic, and bell pepper. Cook for about 3-4 minutes until they are tender and fragrant.
Add Tomatoes and Liquids: To the skillet, stir in the diced tomatoes, chicken broth, and heavy cream. Bring to a simmer and let it cook for 5 minutes, allowing the sauce to thicken slightly.
Combine Everything: Return the cooked chicken to the skillet and mix well. Add the cooked spaghetti and stir to combine, ensuring the pasta is well coated in the creamy sauce.
Finish with Cheese: Remove from heat and stir in the grated Parmesan cheese until melted and creamy. Adjust seasoning with salt and pepper to taste.
Serve: Serve the creamy Cajun chicken spaghetti warm, garnished with chopped fresh parsley.
Notes
Serve in bowls with an extra sprinkle of Parmesan and a side of garlic bread for a complete meal.