In a large baking dish add uncooked white rice, chopped red onion, chopped fresh parsley, and sun dried tomatoes (squeezed dry). Set that aside.
In a large measuring cup or bowl, pour in chicken stock, lemon zest, lemon juice, chicken bouillon seasoning, dijon mustard, 1 tsp salt, and 1 tsp cracked black pepper. Whisk that together until combined. Pour that chicken stock mixture into the baking dish over the rice. Then, drizzle the sun dried tomato oil evenly over the top. Lastly, evenly shake the grated pecorino romano over top and crushed red pepper flakes.
Now, season the chicken thighs with paprika, garlic powder, 1 tsp salt, and 1 tsp of cracked black pepper. Evenly place the seasoned chicken thighs into the baking dish.
Cover the baking dish tightly with aluminum foil and bake it at 350°F for 1 & ½ hours. Once it's done, remove the aluminum foil, fluff up the rice using a fork, and place it back in the oven at 400°F for 8 - 10 minutes until browned. Let it set up for about 15 minutes before serving. Enjoy!