Cooked in slow cooker over low heat for 4 hours. The longer you leave it the better it is.
I know Pete Evans cooks his for 8-12 hours.
This is my recipe with what I had available
1 organic free range chicken
2 Organic Carrot
2 Organic Celery Sticks
1 Cup water
1 Bouquet garni
1tsp black peppercorns
Place all ingredients into slow cooker and cook for 4+ hours on low. Then remove all but the broth. Pull chicken meat off carcass and use for other meals. Toss vegetables unless you want them for a soup
Allow to cool then store in glass mason jars with lids in fridge or freezer in ice cube trays .