01 - Heat olive oil in a large skillet over medium-high heat. Season chicken thighs lightly with salt and pepper, then sear for 2 to 3 minutes per side until the skin develops a light golden crust. This step is optional but builds a deeper flavor base. Transfer chicken to a plate and set aside.
02 - Spread the rinsed rice in an even layer across the bottom of the slow cooker insert. Scatter the diced onion, minced garlic, and diced carrots over the rice.
03 - Place the seared chicken thighs on top of the vegetable and rice layer in a single even arrangement.
04 - Sprinkle the dried Italian herbs, kosher salt, black pepper, and sweet paprika evenly over the chicken thighs.
05 - Pour the chicken broth over the chicken and rice. Drizzle the lemon juice and scatter the lemon zest across the top of all the ingredients. Do not stir.
06 - Cover the slow cooker with its lid. Cook on the High setting for 4 hours or on the Low setting for 7 hours, until the chicken registers an internal temperature of 165°F and the rice is fully tender.
07 - Stir the frozen peas into the rice during the final 20 minutes of cooking. Re-cover and let the residual heat thaw and warm them through.
08 - Once cooking is complete, transfer the chicken thighs to a warm platter. Gently fluff the rice with a fork, spoon it onto plates, and top with the chicken. Finish with a generous scattering of fresh chopped parsley.