01 - Heat olive oil in a large skillet over medium-high heat. Season chicken thighs lightly, then sear for 2 to 3 minutes per side until the skin turns a light golden brown. This step is optional but develops a deeper, richer flavor in the finished dish.
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 - Arrange the seared chicken thighs on top of the vegetable and rice bed in a single even layer.
04 - Sprinkle the dried Italian seasoning, salt, black pepper, and paprika evenly over the chicken thighs.
05 - Pour the chicken broth over the ingredients, then drizzle in the lemon juice and scatter the lemon zest across the top. Ensure the liquid distributes evenly throughout.
06 - Place the lid on the slow cooker. Cook on the High setting for 4 hours or on the Low setting for 7 hours, until the chicken is cooked through and the rice is fully tender.
07 - During the final 20 minutes of cooking, fold the frozen peas into the rice and around the chicken. Replace the lid and allow them to heat through.
08 - Remove the chicken thighs gently. Fluff the rice with a fork, return the chicken to the slow cooker, and garnish generously with freshly chopped parsley before serving.