Creating the perfect Creamy Cajun Chicken Pasta is a simple process if you follow these steps:

1. Cook the Pasta: In a large pot, bring water to a boil. Add a pinch of salt and cook the penne pasta according to package instructions. Drain and set aside.
2. Heat the Oil: In the same pot, add olive oil over medium heat.
3. Season the Chicken: Season the diced chicken with Cajun seasoning, smoked paprika, garlic powder, onion powder, salt, and pepper.
4. Cook the Chicken: Add the seasoned chicken to the pot. Cook for 5-7 minutes until the chicken is browned and cooked through.
5. Add Cream and Cheese: Lower the heat and stir in the heavy cream and Parmesan cheese. Mix well until creamy.
6. Incorporate Tomatoes: Add diced tomatoes to the creamy mixture and stir for another minute.
7. Combine Pasta: Return the cooked pasta to the pot and mix everything together until well-coated.
8. Final Touches: Stir in chopped green onions and adjust seasoning if needed.
9. Serve Immediately: Remove from heat and serve hot, garnished with fresh parsley if desired.

These straightforward steps will guide you in creating a delicious and filling pasta dish effortlessly.