The recipe calls for arctic char, but we used the small pieces of pan fish we had. It worked out well and everything was really tasty. Nate wasn't a huge fan of the tarragon in the recipe, but I didn't think it stood out all that much.
Here is the full recipe for Arctic Char Sandwiches with Lemon-Tarragon Slaw. I couldn't find regular cabbage slaw at Outpost, so we used a broccoli slaw, which I really liked. We had a heck of a time figuring out what to have on the side, so we had some chips and salsa and some cottage cheese. Kind of random, but it worked!