I will be in Glasgow and Edinburgh for nine days at the end of February. As I've never been in Scotland before, I'm seeking any and all suggestions for good, interesting, and hopefully cheap food, things I shouldn't miss or wouldn't be able to get here in New York. It doesn't have to be fancy, either; hole-in-the-wall places are fine.
And of course, best haggis? Anything else quintessentially Scottish? Foodstuff I should make a point of smuggling home?
I'm staying in the SAS Radisson on Argyle Street in Glasgow, and on High Street in Edinburgh, if that helps pinpoint my location any.