We use Yukon Gold (or similar red thin-skin potatoes (Spuds).
About fist-sized, 3-4 minutes on high (1000) each side.
The skins stay nice and edible, we add butter salt etc. after they are cooked.

A good med. rare steak takes about 3-4 min/side (one inch thick) to broil in the oven; the nuked potatoes are ready when the steak is.

My quick Sat. night meal (rationing myself to one good Angus steak/week).

Precede with two fingers of anejo (pure white) tequila, follow with the same, watch about two minutes of the TV news and so to sleep.