You can make this port-spiked compote up to a week in advance. Serve it with our Baked Brie.
Combine all ingredients in a small saucepan. Bring to a boil; cook, stirring occasionally, until port just starts to turn syrupy, 8 to 10 minutes. (Sauce will continue to thicken as it cools.) Let cool completely. Remove cinnamon stick and serve, or store, covered, in refrigerator up to 1 week.