Cook the chicken breasts in a large pot over medium heat until fully cooked, about 6-8 minutes per side.
In the same pot, heat olive oil and sauté onions, garlic, bell pepper, and celery until softened, about 5-7 minutes.
Stir in the Cajun seasoning and cook for another minute to bloom the spices.
Add the chicken broth and bring to a simmer, scraping the bottom of the pot to release any browned bits.
Incorporate the diced chicken and frozen corn into the pot, stirring well.
Pour in the heavy cream and stir until well combined; allow it to simmer for another 5 minutes.
Season with salt and pepper to taste, adjusting as needed.
Serve hot, garnished with fresh parsley.