I love it when chefs serve trompe l'oeil dishes -- things that look like one thing, but are another. Think Wylie Dufresne's carrot and coconut "sunnyside-up egg." I'd love to bring that sense of play and whimsy into my own kitchen.
I like the idea of mushroom macarons (mushroom caps as the "meringue", cheese as the filling), but am looking for other ideas. I think it'd be a lot of fun to do a trompe l'oeil dinner party. Any ideas for a full menu?