Mix stuffing with beaten eggs and matzo meal until combined. Use wet hands to form golf ball-sized balls and refrigerate covered for about an hour.
In the meantime sauté onions, celery and carrots with butter in a large sauce pan for 2-3 minutes until softened. Add frozen garlic, basil and cilantro and cook until dissolved. Pour in chicken stock and bring to a simmer.
Gently add stuffing balls to soup and simmer gently for 20-30 minutes until fully cooked. Add chopped turkey and season with salt and pepper to taste.