When I moved to the Bay Area of California a while back from the East Coast, I could not find my favorite dish, a staple of New York Chinese takeout…cold sesame noodles. It is pretty much ubiquitous in New York City, but I could find them nowhere in the San Francisco area. Plenty of noodle dishes (chow fun, etc.) but no cold sesame noodles. I think I went through withdrawal for a while!
Little Shanghai in Walnut Creek has them (cold sesame noodles that is, not crab rangoon).