In a large skillet, heat the olive oil over medium heat. Season the chicken breasts with salt, pepper, garlic powder, and onion powder. Add the chicken to the skillet and cook for about 6-7 minutes on each side, or until golden brown and cooked through. Remove the chicken from the skillet and set aside.
In the same skillet, add the mushrooms and sauté for about 3-4 minutes until they are tender.
Pour in the chicken broth and heavy cream, stirring to combine. Bring the mixture to a gentle simmer.
Add the frozen peas and cooked rice to the skillet, stirring to combine. Return the chicken to the skillet and spoon some of the creamy mixture over the top.
Sprinkle the grated Parmesan cheese over the chicken and cover the skillet. Let it simmer for an additional 5-7 minutes, allowing the flavors to meld and the sauce to thicken slightly.
Garnish with chopped fresh parsley before serving.