Place chicken, parsnip, turnip, carrots, celery, leek, onion, parsley and dill in an 8 quart stock pot; cover with water and bring to a boil. Reduce heat; cover, and simmer for 2 hours.
Remove whole chicken from soup, tear meat from bone, and set meat aside. Discard chicken bones, parsley and dill. Remove vegetables from stock pot. Using a food processor, puree vegetables and return to stock pot, along with chicken. Salt and pepper to taste.