Gather all your ingredients and lay them out for easy access.
Trim excess fat from the chicken breasts and season with salt and pepper.
In a large pot, heat the olive oil over medium heat. Add the diced onion and sauté until translucent, about 5.
Stir in the minced garlic, sliced carrots, and celery. Cook for another 3-4 until the vegetables start to soften.
Add the dried thyme, oregano, and red pepper flakes. Stir well to combine. Place the chicken breasts into the pot and pour in the chicken broth. Bring to a boil.
Once boiling, reduce heat to low and cover. Let it simmer for 20-25 until the chicken is cooked through.
Remove the chicken, shred it, and return it to the pot. Stir in the heavy cream, frozen peas, and Parmesan cheese. Season with salt and pepper. Simmer for an additional 5-10 until heated through. Serve hot, garnished with fresh parsley.