Place the bread slices on a baking sheet. Lay on a piece of Brie and broil 3 minutes or till the cheese begins to melt and the bread is toasted. Heat the oil in a medium skillet over medium high heat. Add the vinegar, chili sauce and grapes. Cook, stirring till the juices thicken to a syrupy consistency. Stir in the rest of the ingredients. Top each baguette with grape mixture. Garnish with zest. Makes 16 festive holiday appetizers.