The cranberries should be placed in a pan. With a peeler, remove wide strips of zest from half an orange and add them, along with the juice from both oranges (approximately 1/2 cup), to a pot. Add 1 cup of water, along with the sugar, coriander, salt, and pinch. Over medium heat, bring to a simmer; cook, stirring periodically, for 15 to 20 minutes, or until the berries burst and the sauce thickens.
Remove the orange zest and turn the heat off before adding the vanilla. After transferring, mix in a blender until smooth. Using a rubber spatula, press the sauce through a fine-mesh sieve into a serving dish. Set in the refrigerator for at least 3 hours.