Rob wrote:an amuse or canape (is there a difference?)
An amuse bouche (amuse the mouth) is a small hors d'oeuvre, typically bite-size, offered at the very start of a meal. A canape, technically, is an hors d'oeurvre served atop a small piece of bread or a cracker.
Rob wrote:One possibility is to use a bright fruit (cherries or orange peel, perhaps), another, and my real preference would be to use a little grenadine or a bright golden liquer or brandy to add a splash of color. How to you think those tastes would work together?
Cherries, oranges and pomegranates with raw tuna? I don't think that would be to my taste. Lemon or lime zest, perhaps, or some chopped cilantro or tomato? Or if it's red color you're seeking, maybe some V-8 juice or hot sauce. If it's color + alcohol, you might try infusing something in vodka. Angostura bitters might work too.
Rob wrote:can someone suggest a non-dairy desert that would work well (and a recipie for same)?
Rich4 has posted several nice sorbet recipes and Cathy2 has a lemon tart that might work. JoelF has a good Key lime pie recipe, which I think would complement your menu, but it's not nondairy. You can find these through the Recipe Index.