Ingredients. 220 g (1 cup) red (adzuki) beans, soaked overnight in plenty of cold water; 330 g (1½ cups) caster sugar; 500 ml (2 cups) tinned coconut milk; 250 ml (1 cup) milk (you can use ...

The origin of red beans — also called adzuki — has been murky. A new study says Japan is where it all started.