University of Illinois student Stanley Dayan (from left) and Chabad Jewish Center employees Mordy Kurtz and Yosef Peysin work at the center's kosher food stand in 2013 at the university's State Farm Center basketball arena in Champaign, Ill. David Mercer/AP hide caption

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The holes in matzo give the cracker its characteristic crunch, Odelia Cohen/iStockphoto hide caption

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Ritually slaughtered lamb is delivered at a halal butcher shop in The Hague, Netherlands, in 2011. Denmark, Sweden and Norway are among the countries requiring animals to be stunned before slaughter. Dutch lawmakers took up the issue in 2012. Peter Dejong/AP hide caption

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What's what? In Israel, the shape of a boureka pastry traditionally tells you what's inside. Now the country's chief rabbis want the shapes to get a lot more specific to help people keep kosher. Emily Harris/NPR hide caption

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Israelis eat at a kosher McDonald's restaurant in Tel Aviv. David Silverman/Getty Images hide caption

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