Heat a large Dutch oven over medium heat. Once hot, add the chicken thighs, skin side down. Cook until the fat has rendered and the thighs are deeply golden, 5-7 minutes. Set the chicken thighs aside and leave the rendered chicken fat in the pan.
4 chicken thighs
Add in the onion, celery, and carrot. Cook until softened, about 5 minutes. Add in the garlic and cook, stirring for another 60 seconds.
1 yellow onion, 2 celery stalks, 2 large carrots, 4 garlic cloves
Pour in the broth and the water. Add in the salt, pepper, and parsley. Give it a stir, and return the chicken thighs to the pot.
6 cups chicken broth, 2 cups water, 5 sprigs fresh parsley, 1 teaspoon salt, ¼ teaspoon pepper
Bring to a boil, reduce to a simmer, cover, and cook for 30 minutes.
While the soup cooks, start on the matzo balls. In a medium bowl, whisk the eggs and melted butter.
3 large eggs, 3 tablespoons melted butter
Add the matzo meal, dill, salt, pepper, and baking powder, and mix well. Mix in the broth. Cover and refrigerate for 30 minutes.
¾ cup matzo meal, 2 tablespoons chopped fresh dill, 1 teaspoon salt, ¼ teaspoon black pepper, 1/2 teaspoon baking powder, 3 tablespoons chicken broth or water
Once the soup has simmered, remove the thighs to a plate. Shred the meat, discarding the skin and bones. Return the meat to the pot and cover with a lid to keep warm.
Form the matzo mixture into 1-inch balls. Drop them into the soup and return it to a simmer. Cover and cook, maintaining a simmer, for 20 minutes without removing the lid.
Serve with extra dill on top.