Combine Ingredients: Place cranberries, water, sweetener, orange zest, cinnamon and salt in a medium-sized saucepan.
Simmer the Sauce: Boil on medium heat mode. Lower heat and simmer for 10–15 minutes, stirring occasionally, until cranberries burst and mixture thickens.
Add Vanilla: Finally, in the end, add that hint of vanilla to impart depth to your already thickened sauce.
Let It Cool: Take the pot off the heat and let it cool around 10 minutes. The sauce should also thicken as it cools.
Serve or Store: Pour into a bowl or a jar with a lid. Keep in the fridge for up to seven days.