Dried fig relish

Ingredients

• 375 grams (12 ounces) dried figs, stems removed, chopped finely
• 1 small_piece (80g) brown onion, chopped finely
• 2 cups (500ml) cider vinegar
• 3/4 cup (165g) firmly packed light brown sugar
• 1/2 teaspoon ground ginger
• 1/2 teaspoon yellow mustard seeds
• 1 cinnamon stick
• 1/4 teaspoon ground allspice
• 1/4 teaspoon dried chilli flakes
• 1/2 teaspoon coarse cooking salt (kosher salt)