Pour 1 to 2 tablespoons of the Cranberry Concord Syrup into champagne flutes and top with sparkling wine. Stir gently and serve.
Cranberry Concord Syrup:
Combine the cranberries, grape jam, grape juice, sugar and orange zest in a medium saucepan over medium-high heat. Bring to a boil, then reduce the heat and simmer, stirring occasionally, until the cranberries are very soft and easily break apart when pushed with a wooden spoon, about 20 minutes. Do not simmer too hard or the sauce may boil over. Let cool, then strain the syrup into a small pitcher.