If I can speed up a process I will:-) Only a 50 minute time saving from the conventional method, but when you're in a hurry and hungry folk are waiting every minute counts.
NB: Cooking times will vary depending on your microwave wattage. Mine is an oldy 750 watt. It took 40 minutes to cook (I used very, very large potatoes) I also turn the mixture over and the half way mark to speed the process further (grumbles from the folks). I also used an 2 litre ice cream container which has a no. 5 recycle mark.