This sorbet has an amazingly light and delicate flavour. With fresh lavender heads, it will have a surprisingly intense colour—a vibrant translucent pink.
A sorbet like this, with no additives, is best made no more than a day beforehand. It can be kept in the freezer, and moved to the fridge 40 minutes before serving.
You can use fresh or dried lavender. Use whole heads that you have picked yourself.