dropped in the frozen porterhouse, and set the temp to 133°F. While I was in the kitchen, I put a few russet potatoes in the oven, along with my cast iron skillet, and set them to time bake.

It also means that it needs to be handled differently than a porterhouse, T-bone, strip, or filet. Because of their high fat content, rib eyes do well when cooked in a cast iron skillet.