Open. If anyone asks what I'm eating, I say, "Sashimi," even when it is clearly a chunk of mammal meat.
My approach is based on not over-interpreting the question. For example, if I ask someone eating a SAD meal what they are eating, I expect a short, informative answer, such as, "Oriental Chicken Salad. I made a whole big thing of it last night." See the period? No explanation is necessary. People really don't care. They are just making small talk.
BTW, this won't work if you are making a spectacle of yourself, gnawing on great big hunks of bloody flesh with blood dripping down your jowls. Use the same table manners, including plates, bowls, utensils, and napkins, just like everyone else. Save the theatrics for your youtube video!
Also, people who know me well enough to get past the small talk - friends - know I eat raw, unprocessed foods. They know why, too. They know how great I look and feel, and they wish they had my discipline to eat well.