In a large saucepan put the plums, apples, water, onion and the ginger.
Bring to a boil and then simmer gently for 30 minutes.
Add the remaining ingredients and simmer for another hour or until it has reduced and you get a nice thick consistency.
Allow to cool and then blend in a blender or use a stick blender. Pass through a fine sieve.
Using a funnel pour into sterile glass jars/bottles (to sterilize, rinse in hot water and pop straight into the microwave for 1 minute on high)
Leave in a dark place for at least 6 weeks, the flavour develops the longer you leave it and the colour darkens accordingly.
Reprinted with permission of Sous Chef. To visit Sous Chef’s blog, click here.