- In a sauce pan combine grapes, blueberries, sugar, ginger, rosemary, and vinegar. Bring to a boil; reduce heat, and simmer gently until grapes begin to break down, 15 to 20 minutes. Mixture should resemble a course jam, feel free to mash with a fork if you would prefer a less chunky relish.
- Season with salt and pepper to taste. Allow mixture to cool completely before using or storing.
Spread relish over goat cheese or cream cheese and serve with crackers for a creative party appetizer, spoon over roasted chicken or pork, as a spread on turkey sandwiches, or stir into yogurt or cottage cheese.