Combine ingredients:
In a medium saucepan, combine cranberries, sugar, orange juice, water, and salt.

Cook:
Bring to a simmer over medium heat. Cook for 10–15 minutes, stirring occasionally, until most of the cranberries have burst and the sauce thickens.

Flavor boost (optional):
Stir in orange zest, cinnamon, or vanilla at the end if desired.

Cool:
Remove from heat and let it cool to room temperature. The sauce will thicken further as it cools.

Serve or store:
Serve chilled or at room temp. Can be made up to 5 days in advance and stored in the fridge in an airtight container.