Add water, sugar, and ginger to a medium saucepan and bring to a boil
Add cranberries. When the mixture returns to a boil, reduce the heat slightly and simmer for 10 minutes, stirring occasionally
Once most of the liquid has reduced, add orange juice and zest, and remove from heat. Stir for a minute or so, letting additional liquid evaporate.
Pour into a bowl, cover, and let cool. Refrigerate until serving. Makes 2 ¼ cups