Update: Someone mentioned to me that this might be similar to sous vide. The book "Cooking for Geeks" by Jeff Riley talks about this method of cooking.
Mythbusters took a stab at it: http://www.belch.com/blog/2012/11/19/alton-brown-and-mythbusters-cook-lasagna-in-the-dishwasher/
See also: https://www.instructables.com/id/Our-food-instructables/
Step 1: What's Needed:
Hard frozen chicken. I used two breasts fro this example.
A container to protect the foil from being sliced by the hot water
Step 2: Get It Ready.
Insert that package into a container that will fit comfortable on the top shelf.
I would recommend doing this first with just water (i.e. no detergent)) so you know what to expect. A trial run so to speak.
Turn on the dish washer to the longest cycle and make sure it is set on heat dry.
Let the dishwasher do it's thing.
Note the ballast for the overhead light in the kitchen went out and the electrician has not come by yet,
Step 3: Done.
Step 4: Let's Try Fish.
Put the fish in a freezer bag and wrapped that with foil for protection. Dishwasher is done.
Fish was thawed, but not cooked. used a frying pan to finishing the cooking that took no more than a couple of minutes.