Leena's has ruined falafel sandwiches for me.  I cannot eat them anywhere else because they will be sad, sorry shadows of what can be found in this humble shop.  Maybe it's the pickles or the heaping helping of tahini - there is something about these sandwiches that I've never found anywhere else.  You can also get stuffed grape leaves for about two bucks.  If you're looking for great Middle Eastern eats, stop by Leena's!