Season the chicken thighs with salt, pepper, paprika, and thyme.
Heat olive oil in a large skillet or Dutch oven over medium heat.
Brown the chicken thighs on both sides, about 4-5 minutes per side. Remove and set aside.
In the same pot, sauté the onion until soft, then add garlic and cook for 30 seconds.
Stir in the rice and toast for 1-2 minutes.
Pour in the chicken broth and bring to a simmer.
Place the chicken back into the pot, cover, and cook on low for 20-25 minutes until rice is tender.
Add peas in the last 5 minutes if using. Let it sit covered for another 5 minutes before serving.
Garnish with parsley and serve warm.