01 - Pat chicken thighs dry with paper towels. Rub evenly with salt, black pepper, smoked paprika, thyme, and oregano, ensuring full coverage on all sides.
02 - Heat olive oil in a large skillet over medium-high heat. Sear seasoned chicken 2-3 minutes per side until golden brown. This step develops depth of flavor but may be skipped for convenience.
03 - Layer carrots, celery, diced onion, minced garlic, and halved potatoes evenly across the bottom of the slow cooker insert.
04 - Arrange seared chicken pieces directly atop the vegetable bed. Pour chicken broth over everything, ensuring liquid distributes evenly. Tuck bay leaves into the broth.
05 - Cover with lid. Cook on LOW setting for 6 hours until chicken reaches internal temperature of 165°F and vegetables are fork-tender.
06 - Discard bay leaves. Taste sauce and adjust seasoning if desired. For brightness, squeeze fresh lemon juice over chicken. Garnish generously with chopped parsley and serve hot.