Kasia's Deli is famous for Pierogis in Chicago's Polish Community and throughout the City. Kazimiera Bober opened the deli in 1982 and started making pieogis a few years after she emigrated from Poland to the United States. Pierogi machines were nowhere to be found so she adapted a ravioli maker to fill the dough; she finished individual pierogis by hand. The deli flourished and had a hearty following. After 20 years in business she expanded production and started to sell Kasia's Pierogis in grocery stores. Kasia's Pierogis won the coveted "Best Pierogi in Chicago" award at the "Taste of Chicago" summer food festival. Soon she was featured in Newsweek Magazine and her pierogis were served on United Airline flights.
She was very poor when she arrived in Chicago in 1975 and struggled to get by. She started the deli in an old sausage shop to make enough money to bring her children to the United States.