How a non-Jewish Swiss baker's challah wowed the Internet

Challah baker Katharina Arrigoni lives in a town in northern Switzerland with 3,000 residents, none of whom - including Arrigoni – are Jewish. Entirely self-taught, Arrigoni has never tasted a challah other than her own creations. Yet thanks to the power of the internet and Instagram, Arrigoni has become an international challah-shaping sensation.

Arrigoni is the founder of Besondersgut (German for "especially good"), a bakery and baking school located about 15 miles from Zurich. She started baking six years ago when she was 42 years old following a terrible traffic accident. In need of distra...