1) Cut the scallions into 3- or 4-inch long pieces.
2) To create the brush, into the green end, make 1-inch cut.
3) Roll the onion and make another 1-inch cut, perpendicular to the first.
4) Repeat for three and four cuts.
5) To make a double brush, do the other end of the scallion the same way.
6) Dip the scallions into ice water, and after a minute or two the ends will curl attractively.
7) Curls may last up to a week.
8) Garnish the scallion brushes in salads or on side with grilled meats.