I did it for lunch yesterday. Watching me peel off the soft skin and cut up the flesh to mash it, Son-in-Law (he with the hands and upper body strength of a young gorilla) commented that it seemed as much work as cutting it up in the first place and cooking it normally.
Not when you have arthritic hands it isn't! Definitely to be recommended. I think the flavour is better too.
That sounds a brilliant idea if it is easier to cut. Sounds like it may be a bit hot to handle when peeling though so do you let it cool then peel and mash and then heat through? Do you just cook it according to the weight or does it take longer since it is whole?
It is a good idea to use a teatowel to hold it while peeling/cutting. My two small swedes took 20 minutes, side by side in the microwave, the same length as time as a big one would have. I don't know how long one small one would take.
In the comments after a bit on the net about this, someone told how their turnip was incinerated after giving it 20 mins (as per a big swede). I don't think they had noticed that your average turnip is a lot smaller than your average swede.
DH had nearly sliced it in two ready to peel and cut up and I said 'I'll microwave it! (it took 25 minutes) I put it into a deep dish, scooped out the soft middle with a spoon and mashed it with salt, black pepper and butter. Delicious, a stronger flavour than when it is boiled. Thank you.