Preheat convection oven to 375 degrees F.
Drain pears and reserve juice for dressing.
Place pear slices in a bowl and toss with oil to coat.
Arrange pear slices in a single layer on sheet pan lined with parchment paper and bake 35 to 40 minutes, turning once, until the pears are caramelized.
Remove from the oven and cool to room temperature. Makes 2 cups.