Generously coat the chicken breasts with Cajun seasoning, ensuring that all sides are covered for maximum flavor.
In a large skillet, heat the olive oil over medium-high heat until shimmering. Carefully place the seasoned chicken breasts in the skillet. Cook for about 5-7 minutes on each side, or until the chicken is browned and cooked through (internal temperature should reach 165°F). Remove the chicken from the skillet and allow it to rest for 5 minutes before slicing it into thin strips.
Using the same skillet (do not wash it), add the minced garlic and sauté for 1 minute, stirring frequently until aromatic but not browned.
Pour in the chicken broth and bring the mixture to a gentle simmer. Add the orzo pasta and cook for about 8-10 minutes, or until it reaches an al dente texture, stirring occasionally to prevent sticking.
Lower the heat to medium-low, then stir in the heavy cream and grated Parmesan cheese. Mix until the cheese melts and the sauce is creamy, adding a splash of chicken broth if the sauce is too thick.
Gently fold in the chopped spinach and sliced chicken into the orzo mixture. Stir everything together until well combined. Season generously with salt and freshly ground black pepper to taste.
Continue cooking for another 2-3 minutes, or until the spinach has wilted and is bright green.
Remove from heat and let the dish rest for a minute for the flavors to meld.
Notes
Serve in shallow bowls and garnish with parsley and extra Parmesan cheese.