Storage & ReheatingUncooked wontons freeze well — place them in a single layer on a tray until solid, then transfer to a freezer bag for up to 2 months. Cook from frozen by adding 1-2 extra minutes to the poaching time. Cooked wontons will keep in the fridge for up to 2 days in an airtight container; reheat by briefly poaching in boiling water or steaming until piping hot. The chilli sauce can be made ahead and kept in the fridge for up to 1 week in a sealed jar.