How to Make It
Combine sugar and wine in a medium saucepan over medium-high heat; bring to a boil, stirring until sugar dissolves. Add kumquats and cinnamon to pan. Cover, reduce heat, and simmer for 45 minutes. Uncover; bring to a boil. Cook until reduced to 2 cups (about 15 minutes). Discard cinnamon stick. Cool. Cover and chill.