it’s very easy

- Get some bones, any kind will do. No need for anything fancy.

- Boil the bones, place them in a pot of water, bring to a boil, and let simmer for 6-8 hours of more (I usually cook for 8 hours)

- Salt, I do it before eating

- Top up the water, as the broth simmers, water will evaporate. Just add more as needed

Tip: You can use the cheapest slow cooker for this, set it and forget it