1. In a pot on medium heat, combine fennel, onion and apple and salt. Cook for 2-3 minutes until the ingredients begin to soften.
2. Once soft, add in the honey and apple cider vinegar and allow to cook for a further 10 minutes. Stir occasionally to prevent sticking.
3. Add in the water and reduce heat to a low-medium. Cover with a lid and simmer for 1 hour.