Bring 2 cups wine and next 8 ingredients to a boil in a large saucepan, stirring constantly; reduce heat, and simmer, stirring often, 20 minutes.
Stir together remaining 1/2 cup wine and cornstarch until smooth. Stir into hot mixture; bring to a boil over medium heat. Boil, stirring constantly, 1 minute. Remove from heat, and cool. Pour into hot sterilized jars, and seal. Store in refrigerator up to 1 month.