Preheat the oven to 400 degrees F. Set the baguette rounds on a baking sheet lined with parchment paper. Brush the tops of the bread with the oil. Bake 8 to 10 minutes, or until lightly toasted. While that occurs, combine the grapes, shallot or red onion, orange zest and juice, honey and mustard in a bowl. When toasted, cool the baguette rounds a few minutes. Top each with 2 slices of cheese. Divide and top the cheese with the grape mixture. Pop the crostini back into the oven for 2 or 3 minutes, or until the cheese just begins to melt. Arrange on a serving tray, sprinkle with parsley and enjoy.
Recipe Options: Instead of green grapes, use seedless, red grapes to make the crostini topping. Rather than Brie, try blue-veined, cambozola cheese to top the crostini. For added texture and crunch, mix two tablespoons of sliced almonds, lightly toasted, into the grape mixture before spooning it on top of the cheese.