Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine rice, chicken broth, and cream of chicken soup.
Stir in the diced onion, minced garlic, thyme, salt, and pepper.
Pour the rice mixture into a greased casserole dish.
Place the chicken thighs on top of the rice mixture.
Cover the dish tightly with aluminum foil.
Bake in the preheated oven for 45 minutes.
Remove the foil and bake for an additional 15 minutes to brown the chicken.
Check that the chicken is cooked through; juices should run clear.
Let it rest for a few minutes before serving.