I just now have a steak in a cast iron pan in the oven. Pre or post searing aside, I have generally just done it by getting the pan real hot on the stovetop.
While searing today, I had the thought of why not use my propane torch to sear it instead? Typing that into the gazoogles actually came up with a lot of hits to food sites that say this is a viable thing. I'm just wondering if anyone here has done it? Regardless, I'm trying it on the next steak.