In a viral TikTok video, one gardener shows viewers how to use the base of a red onion to grow a new, edible onion stem. In his video, gardening expert Simon Akeroyd (@simonakeroydgardener ...

Begin by preparing the onions, which should have their outer papery skins removed and then be cut in half lengthways from stem to root ... shake and hey presto - Red Onion Tarte Tatin!