Prepare the chicken:
Season the chicken breasts with garlic powder, onion powder, salt, and pepper on both sides.
Sear the chicken:
Heat the olive oil in a large skillet over medium-high heat. Add the chicken breasts and sear for 4–5 minutes per side until golden brown. Remove the chicken from the skillet and set aside.
Make the sauce base:
Lower the heat to medium. Add the chicken broth to the skillet, scraping up any browned bits from the bottom of the pan. Stir in the heavy cream, Parmesan cheese, sun-dried tomatoes, oregano, thyme, and red pepper flakes (if using).
Simmer the sauce:
Let the sauce simmer for 3–4 minutes, stirring occasionally, until it begins to thicken.
Cook the chicken in the sauce:
Return the chicken breasts to the skillet, spooning the sauce over them. Cover and simmer for 8–10 minutes, or until the chicken is fully cooked and reaches an internal temperature of 165°F (74°C).
Garnish and serve:
Remove the skillet from heat. Garnish with fresh basil or parsley before serving. Pair with pasta, rice, or mashed potatoes for a complete meal.