Preheat the broiler. Arrange the bread slices on 2 baking sheets and toast 2 inches from the heat for about 1 minute per side, or until lightly browned. Set aside for at least 1 hour. 2. Tear the toasted panettone into 1 1/2-inch pieces and place in a large bowl. Pour the half-and-half over the bread, making sure all the pieces are moistened. Set aside for 1 hour, or until all the liquid has been absorbed.