that reminds me, IF you have day old doughnuts that have gone hard a quick blast in the microwave (around 10 secs usually) will soften them up again but watch out for super-heated jam when you bite into them. It doesn't work as well with iced doughnuts as the icing melts and you get a kind of...
Yes you can although not as good as properly poached. There are several methods if you google it but what I do is crack the egg into a mug of water and place another glass of water in the microwave too and then go.
I have also thrown the egg into an empty mug and that kind of works but is easy...
I find them pretty good for warming kids food up and if you need to cook potato quickly you can blast it and then scrap out the flesh from the skin and make mash.
You can do a reasonable "poached" egg but you need to place a glass of water in with it to prevent the egg cooking too quickly. Not as good as the proper method but quick and work well on a muffin