Directions. Grate 2 teaspoons of zest from orange; discard remaining peel and pith from orange. Divide orange into sections. Place orange sections, orange zest, cranberries, sugar, and cinnamon in a food processor; pulse until finely chopped. Transfer relish to a bowl and cover; refrigerate to allow flavors to blend, at least 2 hours.
Add the cranberries, water, and orange oil to a medium saucepan. Simmer over low heat, stirring gently and occasionally until the cranberries begin to pop open and their juices begin to flow. Add the vanilla and erythritol.
Add the cranberries, water, and orange oil to a medium saucepan. Simmer over low heat, stirring gently and occasionally until the cranberries begin to pop open and their juices begin to flow. Add the vanilla and erythritol. Stir until erythritol has dissolved completely. Serve immediately.
Cranberries – Fresh cranberries taste best, but frozen cranberries will work as well. Cranberries actually have a small amount of natural sugar, which helps the sauce thicken and gel a little, just like you’d expect from a traditional cranberry sauce. If you have extra cranberries left over, use them to make sugar-free dried cranberries.