This recipe can easily be adjusted to serve more guests.
If you don't have a 6-inch round cutter, use the top of a 6-inch diameter bowl as a pattern. Place the bowl upside down on the crust, and cut around the bowl using a sharp paring knife.
To easily chop crystallized ginger, sprinkle 1 tablespoon sugar on cutting board. Chop ginger on top of sugar to coat sticky sides of ginger in sugar.