Heat the olive oil in a large pot or Dutch oven over medium heat.
Season the chicken thighs with salt and pepper. Add them to the pot and brown on both sides for about 5-7 minutes. Remove the chicken from the pot and set aside.
In the same pot, add the diced onion and sauté for about 3-4 minutes until softened. Add the minced garlic, paprika, and thyme, cooking for another minute until fragrant.
Stir in the rice, coating it in the onion and garlic mixture.
Pour in the chicken broth and bring to a simmer.
Return the browned chicken thighs to the pot, ensuring they are submerged in the liquid.
Cover the pot with a lid, reduce the heat to low, and let it cook for about 20-25 minutes, or until the rice is tender and the chicken is cooked through.
If using, add the frozen peas in the last 5 minutes of cooking.
Once done, fluff the rice with a fork and let it sit covered for an additional 5 minutes.
Garnish with fresh parsley if desired and serve hot.