Trying a frozen salmon fillet, rather large, a generous two portions sized single piece. After some googling, tried 4 mins. then QR. Not done. added 2 mins and ran it again, QR. Still felt a bit of frozen crunch in the center when I used my instant thermometer. Doing another 2 minutes. Will let you know how it turns out. I do not like overdone salmon, but do want it cooked through.
It is finally done after the last round. So, it was a total of 8 minutes, but if I had not interrupted it the two times, maybe it would not need a full 8 minutes from the get-go. If I do it again, I will start with 6 minutes, and 5 mins NPR.