• Juice of 4 limes
  • 400 g (14 oz) caster sugar
  • 3 cm (1¼ in) fresh root ginger, peeled and cut into round
  • 3 mangoes, peeled, stoned and neatly sliced (see picture)
  • 2 pieces of preserved stem ginger in syrup, finely sliced into matchsticks
  • Zest of 2 unwaxed limes, finely grated
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