If using raw carcasses from butcher, roast them at 200˚C for 20-30 minutes.
Place all ingredients into a deep saucepan over medium heat and bring to the boil. Skim off any impurities that form on the surface.
Once boiled, cover with a lid and reduce the heat and simmer gently for about 5 hours, adding extra water if required (usually around 500ml).
Strain the liquid stock through a sieve and cool before refrigerating or freezing.
Stock can be stored in the fridge for up to 5 days or in the freezer for 3-4 months
You can add additional herbs, spices and adjust the amount of salt and pepper to suit individual preferences. Roasting the carcass makes for a richer and darker broth, the longer you leave the stock to simmer more flavour it will have.