I've never seen eggplant used in a tartare before, in fact, I don't think I've ever seen a vegetarian/vegan tartare before at all. When I was a kid my Grandpa always enjoyed beef tartare, and even though I was not a vegan at the time, I found it too strange to try.
Obviously your eggplant tartare is way more tempting, and not to be left ungarnished. I love your plating style, that's definitely been my weakness in all my years cooking.