01 - Rinse the cranberries thoroughly and remove any soft or damaged berries.
02 - In a medium saucepan, combine water, granulated sugar, orange juice, and orange zest. Stir until the sugar dissolves.
03 - Bring the liquid mixture to a boil over medium-high heat.
04 - Add cranberries, cinnamon stick if using, and a pinch of salt to the boiling mixture.
05 - Reduce heat to medium and simmer uncovered for 10 to 15 minutes, stirring occasionally, until cranberries burst and sauce thickens.
06 - Remove from heat and discard the cinnamon stick. Allow to cool to room temperature to thicken further before serving chilled or at room temperature.