Take a very large cooking pot and break the turkey carcass into it, then add the rest of the ingredients. Cover with water, bring up to simmering point, skim off any scum that rises to the surface, simmer for 2- 3 hours. Set a colander over another large pan, and with tongs and a ladle, lift most of the bones and ingredients into colander. Being very careful as liquid is hot, drain remaining stock into colander, let stock completely drain through colander and when drained discard the contents of colander, keeping the liquids in the pan. Place liquid stock back on heat, and slowly simmer for another 10 minutes, this time strain the stock through a strainer and leave to cool, discarding debris in the strainer. Cover and chill overnight.
Ready in 2¼ hours