First, preheat the oven to 375ºF. Then, prep chicken thighs by patting them dry with a piece of paper towel. Generously sprinkle them with chicken seasoning and set aside.
Heat 1.5 tablespoons olive oil in a large Dutch oven over medium/high heat. When olive oil is fragrant. Sear chicken thighs on both sides for 2 minutes to get them golden brown. Remove from heat.
Add 2 tablespoons of butter and 1 tablespoon of olive oil to the pan and use a wooden utensil to remove the brown bits from the bottom. Then, add onion, garlic, mushrooms, carrots and a pinch of salt and saute for 2-3 minutes.
Add in white rice, chicken broth, frozen peas, Worchestershire sauce, and spices, and mix to combine. Turn the heat to high. Once the liquid begins to bubble, immediately remove it from the heat.
Place the seared chicken thighs on top of the rice and place the top on the Dutch oven.
Bake at 375ºF for 35 minutes. Remove from the oven. At this point, the liquid should be completely absorbed. If it's not, continue baking for 5-10 minutes until it absorbs. Check the internal temperature of the chicken thighs. It should read at least 165ºF.
Option to broil the dish on high for around 1-2 minutes to really get the chicken golden brown.
Top with fresh parsley and then serve immediately.