FROM WIKIPEDIA:  Challah is a special bread in Jewish cuisine, usually braided and typically eaten on ceremonial occasions such as Shabbat and major Jewish holidays. Ritually-acceptable challah is made of dough from which a small portion has been set aside as an offering. The word is Biblical in origin. Similar braided breads ? such as kalach, kalács, kolach, or colac ? are found in Eastern Europe, though it is not clear whether these influenced or were influenced by the traditional Ashkenazic challah.
NOTE:  The term "Ashkenazi" refers to Jewish settlers who established communities along the Rhine river in Western Germany and in Northern France dating to the Middle Ages. Once there, they adapted traditions carried from Babylon, the Holy Land, and the Western Mediterranean to their new environment.

LINK to Challah Recipe

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