Ina medium saucepan over medium-low heat, combine the cranberries, maple syrup,water, orange zest, and salt. Bring to a simmer, stirring often so that the maple syrup doesn’t burn.
Reduce the heat to low and cook, stirring frequently, until the cranberries burst and the sauce has thickened, 15 to 20 minutes. Taste and adjust the seasonings, if desired, and serve.