Herbs & SpicesKorean Ingredient GlossaryNuts & Seeds Hot Mustard in Korean Cooking (Gyeoja) by Emily September 27, 2022 by Emily September 27, 2022 Hot mustard, otherwise known as ‘gyeoja’ (겨자) in the Korean language, is an ingredient made by grinding mustard seeds into a bright yellow-orange powder. In this article, we learn about this … 0 FacebookTwitterPinterestEmail