01 - Place chicken, diced onion, carrots, celery, minced garlic, dried thyme, parsley, rosemary, salt, and pepper into the slow cooker. Pour in chicken broth and dot with butter.
02 - Cover and cook on low heat for 5 hours until chicken is very tender.
03 - Remove chicken from the slow cooker, shred with two forks, then return it to the pot.
04 - Whisk flour and heavy cream in a small bowl until smooth. Stir this mixture and frozen peas into the slow cooker.
05 - In a separate bowl, combine flour, baking powder, and salt. Stir in melted butter and milk until just combined. Fold in fresh parsley if desired.
06 - Drop tablespoon-sized dollops of dumpling dough onto the surface of the stew, forming about 10 to 12 dumplings.
07 - Cover and cook on high heat for 1 hour until dumplings are puffed and cooked through.
08 - Taste the dish, adjust seasoning if necessary, and serve hot.