Jerusalem Artichokes
Jerusalem artichokes are aces. Versatile too - you can eat them raw or cooked in any of the same ways you'd cook potatoes. Unfortunately they're a right knobbly bastard to peel. And they go brown immediately (usually half way through peeling) so you have to dunk them straight into acidulated water. Though once immersed they hold their colour well.
You can boil them in their skins and then scrape them afterwards, but if you're looking for style this method does tend to leave you with fairly grubby-looking roots. I find the best way to get bone-white knobbles is to peel them as best, and quickly, as you can using a potato peeler, dunk them in acidulated water, then finish them off using a small knife.

They're also a bit sensitive to the exact amount of cooking - going from a bit too hard to mush in very little time.
Still worth the effort though.

Jerusalem Artichokes with Beurre Blanc
veg side
A nice combination of the nutty, quite radish-like artichoke and the buttery but slightly acidic beurre blanc.

Serves 8

Peel or scrape the artichokes quickly so they don't discolour, you can blanch the artichokes for 5 minutes which makes it easier to scrape them, but then they tend to end up with a darker surface - I prefer to peel them quickly with a peeler, then use a knife to finish them off, cutting away any difficult nodules to leave a clean white surface dousing with acidulated water as you go keep them in acidulated water until needed.

Boil in acidulated water (or steam) for 35-40 minutes or until tender, but not mushy I like them still to have a little crisp bite to them. Pour a puddle of beurre blanc onto a plate and place the artichokes on top, artfully sliced if you like.
Lovely, but a right pain in the arse.
Like potatoes, you could par-boil them and blanch when needed if you need to save 20 minutes. Though I'm not sure that's enough of a saving to be worth the effort.