1. To make the chicken broth: Put the chicken, celery, carrots, onion, diced tomatoes, thyme, garlic, black pepper, coriander, and salt into a large pot. Add enough cold water to cover the ingredients by 1 inch. Bring to a simmer over medium-high heat then reduce heat to low and cook for 1 hour. Remove the large pieces of celery, carrots, and thyme sprigs. Broth can be made up to 3 days in advance if needed. Reheat prior to adding matzo balls.

2. To make the matzo balls, follow the package directions and then add to homemade chicken broth.