My husband was brought up in Sydney and chokos hold a special place in his childhood memory – not a good one. Back then choko vines grew in many Sydney and Queensland backyards.  My husband’s Irish grandmother, who had emigrated to Australia with her family in 1901 and settled in Queensland, loved them and used to send him around the neighbourhood collecting them.  She would boil them and serve them with a white sauce.  He said they were totally tasteless and hated them.  I don’t know if she used them to make chutney, but this recipe might have made them taste a bit better.