I moved to New York from Los Angeles three years ago, and there are three things I haven't been able to find yet.
One is Mexican food, which I see is discussed below. Since I live in Queens, I'll have to check out those places.
The second is a proper Cobb salad. I've been ordering Cobb salads in New York for three years -- and for three years, I've been getting all kinds of bizarre combinations of chicken breasts, spinach greens, Greek olives, celery... I have found one actual Cobb salad in New York, but it's at TGI Friday's, which I really don't enjoy visiting.
And the last is the common apple fritter, which you can get at even the least imaginative West Coast donut shop, but which New York has apparently never heard of. (Those little Krispy Kreme squishballs are good, and everything, but...)
To be fair, I've also found some things in New York that I haven't found in L.A. The Knish Nosh on Queens Blvd. near 68th, for instance, is, as my little sister used to say, mwah.
Any suggestions are much appreciated.