Potatoes
From Cantr II Wiki
One of the most common foods in Cantr, it can be found in many highly populated towns. It can be eaten unprocessed at a rate of 100 grams per day, and which can be farmed at a rate of 800 grams per day, doubled with a dung-fork. Potato farming is easier when you use a potato harvester, which yields 3200 grams of potatoes per day.
