Dice the chicken breast into bite-sized pieces and finely chop the carrots, celery, and onion.
Heat the ghee in a large pot over medium heat, then sauté the carrots, celery, and onion until they begin to soften.
Pour in the chicken bone broth, add the fresh thyme, sea salt, and black pepper, and bring the mixture to a gentle simmer.
Add the diced chicken to the pot and continue to simmer for about 5 minutes.
In a small bowl, whisk together the whole wheat flour, baking powder, and Greek yogurt, adding a tablespoon of water if needed to form a soft dough.
Drop small spoonfuls of the dough into the simmering broth, then cover the pot with a tight-fitting lid.
Steam for 10-12 minutes without lifting the lid until the dumplings are fluffy and the chicken is fully cooked.
Garnish with fresh parsley before serving.