Mushroom Ketchup & Mustard Jus with Beef

Mushroom ketchup is a traditional English condiment.  Larousse Gastronomique describes the use of mushroom ketchup in English cooking as “an addition to season sauces and also as a condiment for cold meat”.  It also gets a mention in Mrs. Beeton’s Book of Household Management, first published in 1861, where she describes how to make yourRead more