for just one minute there, I thought you'd taken the bold step of placing a tin of soup in the microwave and moblogging the results for us....however, you could reduce the washing up output of your technique by simply discarding the plate, and merely coating the microwave with soup, and burning ones hands...a small price if you ask me.
I'd rather never ever clean the microwave.
But thanks for the tip.
If I ever do try to microwave a tin can, I will be sure to have my camera phone at the ready.