Cook the Rice:
In a medium saucepan, bring the water or chicken broth to a boil. Add the rice and salt, reduce the heat to low, cover, and simmer for 15–20 minutes or until the rice is tender and all the liquid is absorbed. Fluff with a fork and set aside.
Season and Sear the Chicken:
Pat the chicken dry with paper towels and season it with salt, pepper, garlic powder, and smoked paprika. Heat olive oil in a large skillet over medium-high heat. Sear the chicken on both sides until golden brown, about 4–5 minutes per side. Remove the chicken and set aside.
Prepare the Gravy:
In the same skillet, melt the butter over medium heat. Add the sliced onions and cook until soft and golden, about 8–10 minutes. Stir in the minced garlic and cook for 1 minute. Sprinkle the flour over the onions and stir well, cooking for 1–2 minutes to remove the raw flour taste.
Build the Sauce:
Gradually whisk in the chicken broth, ensuring there are no lumps. Add the Worcestershire sauce, dried thyme, and heavy cream (if using). Bring the mixture to a simmer and season with salt and pepper to taste.
Smother the Chicken:
Return the seared chicken to the skillet, nestling it into the gravy. Reduce the heat to low, cover, and simmer for 25–30 minutes, or until the chicken is fully cooked (internal temperature of 165°F/74°C) and tender.
Serve:
Spoon the fluffy rice onto plates and top with the smothered chicken and gravy. Garnish with fresh parsley if desired.