01 - Generously season chicken thighs on all sides with salt, pepper, paprika, thyme, and rosemary, ensuring even coating.
02 - Heat olive oil in a skillet over medium-high heat. Add seasoned chicken thighs and sear for 2-3 minutes per side until golden brown. This step enhances flavor depth but may be omitted for convenience.
03 - Layer carrots, potatoes, onion, celery, and garlic evenly across the bottom of the slow cooker insert, creating a bed for the chicken.
04 - Arrange browned chicken thighs over the vegetable layer, ensuring pieces are not overcrowded for even cooking.
05 - Pour chicken broth evenly over the chicken and vegetables, allowing it to distribute throughout the slow cooker.
06 - Cover with lid and cook on low setting for 6 hours. Chicken should register 165°F internally and vegetables should be fork-tender.
07 - Transfer chicken and vegetables to serving plates or a platter. Ladle cooking liquid over the top and garnish with fresh chopped parsley if desired. Serve immediately while hot.