Kangaroo and emu steaks. Heaven on earth. In the UK good local butchers sometimes have them or can order them in for you. I've had kangaroo steaks in Walkabout bars too. The best I've eaten were when I was actually in Australia, unsurprisingly, but imported ones here are still pretty good.
PS. I agree about baklava, though I wouldn't say it was particularly obscure. Pretty much every Turkish, Greek or Middle-Eastern cafe or restaurant sells it. I have to say though that the stuff I've had in the UK has generally only been of average quality - surprisingly, the best I've ever tasted was in Auckland. That was absolute perfection.
EDIT: I suppose kangaroo and emu steaks aren't particularly obscure either, actually. But they are quite difficult to find in the UK, unless you go to a Walkabout bar, and even those don't have emu, just kangaroo.