A 77-year-old Ukrainian man won a jar full of sour cream for coming first in a dumpling eating contest and then promptly died.Ivan Mendel ate 10 dumplings in half a minute to win first place and a one-liter jar of sour cream in the contest held in the town of Tokmak in the southeastern Zaporizhya region on September 18, Fakty I Kommentarii newspaper said.Shortly afterwards, Mendel became unwell and died, according to local news websites.Dumplings, called "vareniki" in the former Soviet republic, are a staple of Ukrainian cuisine and are often stuffed with a range of fillings from mushrooms to cherries.