At least 1 day before baking the pie, in a large, heavy-bottomed Dutch oven, bring the all of the ingredients except the piecrust a boil over medium heat, stirring often. Reduce the heat to medium-low and cook at a brisk simmer, stirring often, until the fruits are softened and the liquid almost completely evaporates, about 25 minutes. Transfer to a medium bowl and cool completely. Cover tightly with plastic wrap and refrigerate at least overnight or up to 1 week.