Potato farls.
I'm sure there's more but that's the first thing that popped into my mind.
Man, I love those.
Sausages, definitely - being able to get an Old Spot sausage sandwich from Fernandez & Wells on my way into work when I have a hangover is probably the best thing ever.
Good black pudding, I am fully aware it's made from blood, don't care, delicious. I love morcilla as well which is pretty much the same thing.
Unpasturised raw milk cheeses, oh so many delicious cheeses, oh so illegal
Sugar free Ribena, although there's lots of lovely sugar-free still drinks in the US.
Wotsits
South east Asian food I haven't cooked myself.
Pies! Oh pies, so delicious, so unhealthy.