This recipe is part of our "Around-the-world prawn sandwich" series. Pro Tip: the pickle needs at least 2 hours refrigeration but you can make it up to 1 week ahead and have it ready when you make the sandwich, which doesn't need any cooking and can be put together in a matter of minutes.
Stir vinegar, sugar and 75ml warm water in a saucepan over medium heat, stir until sugar dissolves, add carrot, remove from heat and allow to cool. Cover and refrigerate to pickle (at least 2 hours / up to a week).
Place ingredients in a bowl and stir to combine, season to taste and refrigerate until required.
To serve, spread baguettes with lime-chilli mayo and top with prawns, cucumber, drained pickled carrot, herbs, chilli to taste and crushed peanuts.