'Jewish Christmas' at L.A. Chinese Restaurants

Christmas is next Friday, what will you be eating? Gingerbread? Mashed potatoes? Or, if you don’t celebrate Christmas, how about sesame noodles and orange chicken? Yes, the idea of Jews eating Chinese food on December 25 is so ingrained, it’s become a punchline. But is it a provable phenomenon? And if so, how did the trend start?