Vegan Matzo Ball Soup

Name: Vegan Matzo Ball Soup
Ingredients: Vegan Broth & Soup Assembly; 8 celery stalks; 5 medium carrots; 2 medium parsnips; 1/4 cup extra-virgin olive oil; 2 heads garlic, unpeeled, halved crosswise; 2 medium yellow onions, unpeeled, halved through the root end; 2 tablespoons whole black peppercorns, plus more freshly ground; 1 bunch parsley; Kosher salt; 1 (15.5-ounce) can chickpeas, drained and aquafaba reserved (optional); Freshly chopped dill, for serving; Vegan Matzo Balls; 1 cup matzo meal (not matzo ball mix); 1/2 cup chickpea flour; 1 1/2 teaspoons kosher salt; 1 teaspoon freshly ground black pepper; 2 teaspoons baking powder; 3/4 cup aquafaba, drained from a 15.5-ounce can of chickpeas; 1/4 cup finely chopped dill, parsley, or a mixture of both; 2 garlic cloves, grated