01 - Heat olive oil in a large skillet over medium-high heat. Pat the chicken thighs dry with paper towels and sear for 2 to 3 minutes per side until lightly golden. This step is optional but builds 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 - Place the seared chicken thighs on top of the vegetable and rice layer, skin side up, spacing them evenly.
04 - Sprinkle the dried Italian herbs, salt, black pepper, and paprika evenly over the chicken thighs.
05 - Pour the chicken broth, lemon juice, and lemon zest over all the ingredients. Ensure the liquid distributes evenly around the chicken and through the rice layer.
06 - Cover the slow cooker and 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 last 20 minutes of cooking. Gently fold them in so the chicken portions remain intact.
08 - Remove the chicken thighs temporarily. Fluff the rice gently with a fork, then return the chicken to the slow cooker. Garnish each portion with fresh chopped parsley and serve warm.