Dissolve bouillon cubes in warm water to create chicken broth.
Preheat oven to 375°F.
In a small bowl, combine the oregano, paprika, onion powder, garlic powder and pepper; set aside.
In a sauce pan, bring chicken broth to a boil.
Put the brown rice in a 9"x13" deep baking dish; add 1 ½ teaspoons of the seasoning mixture and the minced garlic to the rice; then pour on the hot chicken broth; stir to combine.
Cover the baking dish TIGHTLY with aluminum foil; bake for 30 minutes.
Rub the chicken thighs with olive oil; then sprinkle the remaining seasoning onto the thighs and rub in.
After 30 minutes of baking; remove the baking dish from the oven. Place the chicken thighs over the rice; cover the dish TIGHTLY with aluminum foil again and return to the oven to bake for an additional 40 minutes.
After 40 minutes, uncover the baking dish and sprinkle on the parmesan cheese. Bake for 10 minutes (uncovered) until cheese has melted and started to crisp.
Let casserole rest for 10 minutes before serving.