3kg plums, washed and chopped
6 cups cider vinegar
500g onions, peeled and roughly, chopped
6 garlic cloves, peeled and roughly chopped
3 teaspoons salt
1 tablespoon grated fresh green ginger
3 tablespoons ground allspice
2 teaspoons ground cloves
1 teaspoon ground cinnamon
1 teaspoon cayenne pepper
1 teaspoon mustard powder
juice of 1 lemon
Place all ingredients in a very large saucepan and stir over medium heat until sugar is dissolved and mixture is boiling. Continue to boil for 2 hours or until mixture is thick.
Strain through a coarse sieve. Bring back to the boil, then bottle and seal immediately. Consume at once or store in a cool, dry and dark place for up to 2 years.