Via The Urban List. Stumbled across this. From its website, Suppertime appears to be home delivery service that focuses on slightly fancier restaurants. (Selection of restaurants seems rather different to what's available on Menulog or Delivery Hero - although there is some overlap.)
I've never used its service before but it's probably worth a try with $20 off.
I can't find any t&c's for the code and don't know when it expires though.
Min spend?