Heat olive oil in a large skillet or frying pan over medium heat. Add the chicken and season with salt and black pepper, to taste. Cook for 6-8 minutes stirring occasionally until the chicken is browned on all sides.
Meanwhile, place the chopped celery, onion, carrots, and potatoes into the slow cooker pot. Then add the part-cooked chicken on top.
Add the bay leaves, dried herbs, and chicken stock to the pot. Season with additional salt and black pepper, as desired, and stir to combine.
Cover and cook on high for 4 hours or on low for 8 hours.
Remove the lid and stir to combine. Remove and discard bay leaves.
Taste and adjust seasonings, as desired, and serve immediately topped with some fresh chopped parsley. Enjoy!