01 - Rinse the cranberries thoroughly and discard any soft or bruised berries.
02 - In a medium saucepan, combine cranberries, orange juice, orange zest, sugar, and water.
03 - Place the saucepan over medium heat and stir continuously until the sugar completely dissolves.
04 - Bring the mixture to a gentle simmer. Cook for 10 to 12 minutes, stirring occasionally, until cranberries burst and the sauce thickens.
05 - If desired, stir in ground cinnamon and a pinch of salt.
06 - Remove from heat and allow the sauce to cool to room temperature; it will thicken further as it cools.
07 - Transfer the sauce to a serving bowl or airtight container and refrigerate until ready to use.