In a large pot, heat olive oil over medium-high heat. Add the chicken pieces and sprinkle with Cajun seasoning. Cook until golden brown and cooked through, about 5-7 minutes. Remove the chicken from the pot and set aside.
In the same pot, add the chopped onion and sauté until translucent, about 3-4 minutes. Stir in the minced garlic and cook for an additional 1 minute until fragrant.
Add the orzo pasta to the pot, stirring to coat it in the leftover oil and flavors.
Pour in the chicken broth and bring the mixture to a simmer. Reduce heat to medium-low, cover, and cook for about 10 minutes, stirring occasionally, until the orzo is al dente.
Stir in the heavy cream and grated Parmesan cheese until well combined. Add the cooked chicken, cherry tomatoes, and fresh spinach, and let everything meld together for an additional 5 minutes.
Season with salt and pepper to taste. If the mixture is too thick, add a splash more chicken broth or cream.
Garnish with chopped parsley before serving.
Notes
If the mixture is too thick, add a splash more chicken broth or cream.