Fasting with Veggies

Just had a call from a person about to begin a fast for spiritual reasons. He asked if a potato were a fruit or a vegetable--apparently veggies are ok on this fast. So I said that the spud was  in the vegetable column and definitely not a fruit. I explained, however, that many veggies , botanically speaking, are fruits because anything edible that develops from a flower is a fruit.

But the potato, an underground tuber, the storehouse for the potato plant of excess nutrients the plant does not need at the time, may not exactly be what the spiritual fasting gods ordered either, growing in the dark as it does.....