Stir together jam and balsamic glaze in small bowl until smooth. Add blackberries; toss to coat. Set blackberry mixture aside. Cut cheese crosswise into 6 (½-inch each) slices.

Heat large grill pan over medium heat. Add cheese slices; cook 2 to 3 minutes or until bottoms begin to brown. Turn cheese slices over and cook 1 to 2 minutes more or until golden brown.

To serve, place cheese slices on small serving plate. Top with chopped cucumber, then blackberry mixture. Garnish with basil if desired. Serve warm.