In a large skillet, heat the olive oil over medium heat. Add the diced chicken and sprinkle with Cajun seasoning. Cook until the chicken is golden brown and cooked through, about 6-8 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, add the chopped onion and sauté until softened, about 3-4 minutes. Add garlic and green bell pepper, cooking for another 2 minutes until fragrant.
Stir in the cherry tomatoes and cook until they begin to soften, about 2 minutes.
Add the orzo pasta to the skillet, stirring for 1 minute to toast it slightly.
Pour in the chicken broth and heavy cream; stir to combine. Bring the mixture to a gentle simmer and cook for about 12-15 minutes, or until the orzo is tender and has absorbed most of the liquid, stirring occasionally.
Once the orzo is cooked, return the chicken to the skillet along with the chopped spinach. Cook for an additional 2-3 minutes until the spinach wilts.
Stir in the grated Parmesan cheese and adjust the seasoning with salt and pepper to taste.
Notes
Serve the creamy orzo in bowls garnished with fresh parsley and an extra sprinkle of Parmesan for added flavor and color.