- Description Reviews Description: Created with traditional Welsh flavour, this authentic Leek Mustard is a must-have for anyone seeking authentic Welsh produce. Each batch of Calon Ln sauce, chutney, or jam is crafted in by hand, in small batches, is Pwllheli, situated on the Lln peninsula. IngredientsWater,MustardSeeds26%,Malt Vinegar (from maltedbarley), Leeks 12%, Salt,Sugar, Garlic Powder, Ground Turmeric. Suitable for vegetarians and vegans. (0 ) Reviews: No reviews yet. Be the first to review! Write a Review Your email address will not be published. Required fields are marked. You must be logged in to post a review.