Dice the chicken breast into small, bite-sized pieces and season with a pinch of the sea salt and black pepper.
Heat the ghee in a medium pot over medium heat and sear the chicken for 4-5 minutes until golden, then remove and set aside.
Add the diced onion, carrots, and celery to the same pot and sauté for 6 minutes until the vegetables are tender and fragrant.
Pour in the chicken broth and bring the mixture to a gentle simmer over medium-low heat.
In a small mixing bowl, whisk together the flour, baking powder, chopped parsley, and the remaining salt and pepper.
Slowly stir the milk into the flour mixture until a soft, slightly sticky dough forms.
Return the chicken to the pot, then drop rounded teaspoons of the dumpling dough onto the surface of the simmering broth.
Cover the pot with a tight-fitting lid and steam for 10-12 minutes without opening the lid until the dumplings are puffed and cooked through.
Turn off the heat and gently fold in the Greek yogurt to create a rich, creamy consistency before serving.