Potatoes
"Potatoes. In the spring, last year's rotten or frozen potatoes were searched for in the heaps of soil and leaves in the field, then washed, dried, peeled, shredded, and mixed with water, then made into pancakes.
Also, potatoes were washed, dried, shredded, poured into boiling water, salted, and cooked.
The starch was separated by washing, shredding, and covering with cold water. The remainder was dried and eaten, or mixed with flour to make bread.
Rotten and dried potatoes were peeled, washed, and used for starch."