Mushroom ketchup is an old 18th century recipe from Britain and colonial America. Its a salty mushroom extract. Its used as a sauce with meats and as an ingridient in many old time British recipes. Mushroom Ketchup A condiment from mushroom extract 300 gram mushroom (chopped)2 tsp salt1 bayleaf (medium)8 clove (crushed)1 tsp horse raddish1/2 tsp kashmiri chilli powder1/2 tsp allspice berries (crushed)80 ml white vinegarzest of 1 lemon1 onion (medium, chopped, optional) Put salt into the mushrooms and leave it over night.Put the rest