Are you eating real wasabi? Or just green-dyed horseradish? How do you tell the difference? And how is real wasabi grown? Dr Janet Colston, founder of the Functional Plant Company in Scotland, explains it all. Podcast by Annabel Slater. Find FoodUnfolded on: www.foodunfolded.com www.instagram.com/food.unfolded Find the Functional Plant Company at: http://thefunctionalplantcompany.com