Rinse the cranberries under cold water, discarding any that are moldy or damaged.
In a medium-sized saucepan, combine the water and brown sugar. Stir over medium heat until the sugar has completely dissolved.
Add the cranberries to the saucepan and increase the heat to bring the mixture to a boil.
Once boiling, reduce the heat to medium-low, and let it simmer for about 10-15 minutes. Stir occasionally until the cranberries burst and the mixture begins to thicken.
Stir in the vanilla extract, orange zest, and a pinch of cinnamon. Taste the sauce and add a small pinch of salt if desired, to enhance the flavors.
Remove from heat and allow the sauce to cool; it will thicken further as it cools.
Once cooled, transfer the cranberry sauce to a serving bowl or jar, cover, and refrigerate until ready to serve.
Notes
Serve in a glass bowl and garnish with whole cranberries or an orange slice for an elegant presentation.