Please keep us updated re: your venture. Is Tru in Chicago New/Progressive American as well? I'm curious as to what extent duck tongues have broken out of Chinese cuisine. I've only seen duck tongues sold with the bone in. Do you debone it or serve it as is? I'm not sure frying would be the best as it's all about the texture. I feel that the texture of the batter would overwhelm the tongue. Your best bet may be a thick sauce of some kind. I'm not a pro, of course, so perhaps your instinct is more keen than mine. I can ask my mother for a her "red sauce" Shanghai/Beijing style recipe if you like. It's very simple, really highlights the tongues and may be a good starting point for experimentation. For those that have never tried it, it's probably one of the most accessible of the "exotic" Chinese ingredients, probably more so than say duck gizzards, tripe, sea cucumber, pig ear, etc. Speaking of which, have you tried duck gizzards? A wonderful gamey taste, not too tough or chewy either. That description doesn't really do it justice, but let me say that I like it more than chicken gizzards. I can give you a good stir fry recipe if you're interested. It's rather home-style and maybe unfit for a restaurant but I'm sure you can figure out how to improve it from there.