Salsify is the asparagus of the winter. A nutritious core lies underneath their rough skin, reports the Austrian newspaper 'Kleine Zeitung' on their website.
After peeling, the roots change colour quite quickly due to the air. This is why they need to be put immediately into lemon- or vinegar water after being peeled. You also need to be careful when washing them: a white/yellow sap can ooze out of root which can be very sticky and hard to remove once in contact with your skin. This is why you must wear gloves when washing and peeling the vegetable root.