Speaking of horseradish mustard, one of the little tours we went on while in Japan was to a wasabi farm - wasabi, for those not partial to frequenting sushi parlors, is a green condiment, usually served with sushi, with the same ability as horseradish to blow your ears off if eaten with abandon. As some of you I'm sure know, wasabi in America (and, I dare to believe, even often in Japan) is usually made of a paste of regular (European) horseradish with a bit of green food coloring. It is, however, a different plant entirely, although it is also the root (actually, in the case of wasabi, the rhizome) which is used. This rhizome does indeed have a green color, and doesn't need the dye added. It is, however, very expensive. I bought my hostess a small root (for somewhere around $5; could have spent $10 for a slightly larger one), which gift was greeted with delight. At the same time I bought one for myself (or, truthfully, the other way 'round - mine first, with a belated thought to the lovely lady who took such good care of us for the first part of our trip). I admit here to bringing the thing back into the country, contrary to established order, in the hopes of encouraging it to grow in my garden. I wil need to do some research - the wasabi at the farm was growing in gravel, with clean river water washing it's roots all the time; I have no running water on my property. $5 for a condiment that tastes just like horseradish (which has no problems growing - and growing! - in my garden) is rather expensive; $5 for a horticultural experiment that may, or may not, work, but will prove a learning experience in either case, seems like a bit of cheap fun