1. In a medium saucepan, combine berries, sugar, and vinegar. Crush berries with the back of a wooden spoon, then bring mixture to a simmer over medium heat and cook, stirring occasionally, until berries have released most of their juices, about 10 minutes.
2. In a small bowl, combine cornstarch and water and whisk to blend. Stir into berry mixture and cook until thickened, 3 to 5 more minutes. Serve immediately or refrigerate for up to 5 days.
Source: Hannaford fresh Magazine, March-April 2022