Name: Mushroom Catchup
Ingredients: Fresh mushrooms; Coarse sea salt

Mushroom Catchup

Ingredients

Fresh mushrooms
Coarse sea salt

Directions

Select fresh, full-grown mushrooms starting in September.
Layer mushrooms in a deep earthen pan, sprinkling each layer with coarse sea salt.
Repeat layering until all mushrooms are used, finishing with salt on top.
Let the mixture sit for 2-3 hours to allow the salt to penetrate.
Pound the mushrooms in a mortar or mash them well.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.