Chicken and Matzo Ball Soup

Matzo balls can be made 2 days ahead and cooled uncovered in broth, then chilled, covered. Reheat over medium heat.

Ingredients for matzo balls:
1 small onion, peeled and finely grated
4 large eggs, lightly beaten
3 T melted chicken fat or vegetable oil
1/4 cup water
1 T finely chopped dill
1 teaspoon salt
1/4 teaspoon black pepper
1 cup matzo meal

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Ingredients for the soup:
2 quarts homemade chicken soup
2 T chopped celery leaves
1 T finely chopped fresh dill

Preparing the matzo balls:
Stir together all ingredients until well blended and chill, covered at least 1 hour.
Bring an 8-quart pot of salted water to a simmer. With wet hands, roll matzo mixture into 8 balls and simmer, covered, until cooked through, about 35 minutes -- The matzo balls expand.

Meanwhile, heat the chicken soup until simmering in a wide 5-quart pot and transfer matzo balls with a slotted spoon to soup. Gently simmer with celery leaves and dill for 5 to 10 minutes, then serve.