Mix all Cajun seasoning ingredients in a small bowl.

Heat olive oil and butter in a large pot over medium heat. Add diced chicken and half the Cajun seasoning. Cook until browned. Remove chicken and set aside.

In the same pot, sauté onions until softened.

Add uncooked pasta, tomatoes (with juices), chicken broth, remaining seasoning, and cooked chicken. Stir and bring to a boil.

Lower heat, cover, and simmer for 10–12 minutes or until pasta is tender and liquid is mostly absorbed.

Stir in cream cheese until melted and creamy.

Top with sliced green onions and serve hot.