RECIPE: Truffled Matzoh Ball Soup

https://www.foodnetwork.com/recipes/truffled-shiitake-matzo-ball-soup-recipe-1909309
http://www.seattlemag.com/article/tanakasan-chef-cooks-bonito-flakes

http://theblissfulchef.com/2010/11/meatless-monday-shiitake-dashi/

http://www.epicurious.com/recipes/food/views/chicken-soup-with-wild-mushrooms-and-herbed-matzo-balls-1602

http://articles.philly.com/2014-04-11/food/49035205_1_matzo-balls-broth-soup