Place blueberries, sugar, vinegar, ginger, lime juice, salt and pepper in a large saucepan over medium-high heat. Stir until the sugar dissolves, about 5 minutes. Bring to a simmer, reduce heat to medium-low and simmer, stirring occasionally, until the blueberries have mostly broken down and the sauce has thickened, 20 to 30 minutes. Spoon into glass jars or a large bowl and refrigerate until chilled and thickened, about 4 hours.Advertisement
Make Ahead Tip: Cover and refrigerate for up to 2 weeks or freeze for up to 1 month.
To oil a grill rack, oil a folded paper towel, hold it with tongs and rub it over the rack. (Do not use cooking spray on a hot grill.)