If you don't have a grill or it's not grill season yet you can toast the bread in the oven or on a grill pan/skillet. To toast the bread in the oven, preheat it to 350 degrees F. Lay the oiled bread slices out in a single layer on a rimmed baking sheet, then toast for about 10 minutes, flipping halfway through. Otherwise, heat a medium skillet over medium, then place oiled bread slices in pan (in batches if necessary) and toast for 2 to 3 minutes per side (watch closely).