Black pudding is one of my favourite foods. It's the reason why I love the so-called English breakfast so much, though it's easier to find black pudding in Scottish and Irish cafes.
Honestly if iron wasn't toxic beyond a certain level, and if it wasn't generally inadvisable to eat an unvaried diet, I would probably substitute most of my meals for black pudding and scrambled eggs... in toasted bagels. Perfection.
It's also delicious.