Preheat a grill on medium heat. Drizzle one side of the baguette slices with olive oil, then place oiled side down on the grill. Toast until crisp and browned. Remove to a plate, toasted side up.
Add one slice of pear and one slice of brie. Top with a thyme sprig (or sprinkle with dried thyme) and drizzle with balsamic glaze. Serve.