What’s good for your immune system, helps digestion, was once used as a cough remedy and is now a delicious sweetie? Sally Hammond knows. If you’d asked me whether the ultra-sweet powder I was tasting had anything to do with Guinness or the Greeks, I’d probably have laughed outright. Yet our knowledgeable guide at Green Grove Organics assured us that licorice (or liquorice, both spellings are correct), known to the Greeks since at least 3BC and possibly as far back as 4000 years, is also used to flavour that much-revered Irish stout. It’s equally valuable for easing constipation, and its...