Where fore art thou Corned beef hash?
My fickle mistress, where upon doth thou lie?
I read on here that Clark's in brooklyn heights made their own, but when I asked the (very gruff) waiter said they do not. Perhaps it is still quite good (not canned) but I didn't order it.
The best I know of is Thomas Ham and Eggery in nassau county, anywhere in brooklyn or queens? I'm gonna go post this on manhattan now too.
If Clark's isn't canned, the recipe was deliberately created to taste exactly like canned. Or, in other words, it is canned. Which is fine---I like canned CBH. My experiences of home made (none local) range from as much better than canned as one would expect from home made to not as good as Broadcast canned CBH due to poor execution or overly creative efforts (like that pepper thing mentioned in another post) that detract from the corned beef hashedness of the dish.
Sorry that I have no suggestions for your quest but I hope that if you do score some good hash you will share the info here.