2 lbs edible mushrooms, chopped
3 tbsp salt
1 onion, chopped
2 tbsp finely ground fresh horseradish
1 tbsp lemon zest
¼ tsp cloves
½ tsp allspice
¼ cup cider vinegar
1 pinch of ground cayenne
Combine the mushrooms and salt. Stir, smash well, and let rest 10 minutes.
10 minutes
Transfer mushrooms to a non-metal container, such as a ceramic crock. Cover and let sit overnight.
Combine the mushrooms, onion, horseradish, lemon zest, cloves, allspice, vinegar, and cayenne. Bring to a simmer and cook for 15 minutes.
15 minutes
Drape a clean cloth over a bowl. Pour the mixture over the cloth, and squeeze to extract all the liquid. The liquid is the mushroom ketchup.