Just leave it to cool completely then transfer to freezer-friendly bags or an airtight container. Make sure to squeeze out any air from the bags but leave room for expansion. The soup can be kept in the freezer for up to 3 months. To reheat the soup let the soup defrost overnight in the fridge then reheat on the hob until piping hot. This soup will keep in the fridge for 3 days. The feta toast is not suitable for freezing.