Potatoes of Columbian Exchange
A. The Origin of the Potato as we know it today is Southern Peru and Northwestern Bolivia.
B. Pierogis http://en.wikipedia.org/wiki/Pierogi
Polish Potato Pie http://easteuropeanfood.about.com/od/starches/r/po...
C. Spanish conquered the Incas 1650, then introduced them to Europe. Slow to catch on but soon became a major staple and played a major role in the 19th cntury population boom, and were the cause of the Great Irish Famine in 1845.