|Pommes De Terre Au Lard or Speckkartoffeln (Bacon Potatoes).|
According to this paper (thanks JC):
"The value of whole potato in human nutrition",
by Stanislaw Kazimiarz Kon and Aniela Klein, State School of Hygiene, Warsaw, Poland.
(Received December 29th, 1927.)
The potato is a very important constituent of the diet of many civilised nations, and it may be considered to furnish, with bread, the bulk of the food of the rural population of such countries as Poland and Russia. There is little doubt that the Polish or Russian peasant is nevertheless very healthy and able to do extremely hard work under trying conditions. Deficiency diseases such as beriberi, pellagra or scurvy are practically unknown in Poland.
The diet consisted of potatoes, supplemented with butter or pork fat with the addition of a few fruits (apples and pears); tea or black coffee and sugar were also occasionally taken. The amount of fat consumed was not accurately estimated, it varied from 120-150 g.
They consumed between 1-1.7kg of potatoes daily, which amount to about 200-300g of carbohydrates, thus given the amount of animal fat they consumed, works out at 50% (roughly) fat diet by calories. It is hard to estimate it more accurately, since the pre-WWII traditional Eastern European breed of potatoes that they probably used contained more protein and less starch than the high yielding post-WWII varieties. They also tasted much better (H).