Eighty years after Auschwitz was liberated from the Nazis, Jews who make a pilgrimage there can eat kosher food. A mile from the concentration camp, visitors will be able to buy packaged, shelf-stable kosher meals for the first time at the Auschwitz Jewish Center — now a museum and the only surviving synagogue in Oświęcim, the Polish town renamed Auschwitz by the Nazis. The kosher concession will open in time for Yom HaShoah, Israel’s Holocaust Remembrance Day, beginning on the night of April 23. The day is marked in Poland with the March of the Living, in which thousands of...