In a large skillet, heat the olive oil over medium-high heat. Season the chicken breasts with salt, pepper, garlic powder, and onion powder. Add the chicken to the skillet and cook for about 5-7 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 rice and stir for about 1 minute. Pour in the chicken broth and bring to a boil. Reduce heat to low, cover, and simmer for 15 minutes, or until the rice is tender and the liquid is absorbed.
Stir in the heavy cream, frozen mixed vegetables, thyme, and paprika. Return the chicken to the skillet, nestling it into the rice mixture. Sprinkle the Parmesan cheese on top.
Cover the skillet and cook on low heat for an additional 5-10 minutes, until everything is heated through and the cheese is melted.
Garnish with fresh parsley if desired and serve hot.