Matzo Ball Soup With Dill-Horseradish Pistou is a comforting and flavorful soup that combines traditional Jewish flavors with a modern twist. The matzo balls are light and fluffy, made with matzo meal, eggs, and seltzer water. The soup is flavored with chicken broth, carrots, celery, and onions. The dill-horseradish pistou adds a tangy and herbaceous kick to the soup, making it a truly unique and delicious dish. Serve this soup as a starter or as a main course with a side of crusty bread.