
When you think of ketchup you probably bring to mind the thick red tomato stuff, but mushroom ketchup is older than that. It's easy to make and packed with umami.

250 grams large flat (portobello) mushrooms
250 grams chestnut mushrooms
20 grams dried porcini mushrooms
100 ml boiling water
1 medium onion
60 ml malt vinegar
2 tbsp brown sugar
2 tbsp Henderson's Relish or Worcester sauce
1 juice of lemon
salt and ground black pepper to taste
half a tsp nutmeg
half a tsp mace