Preheat broiler. Arrange eggplant slices in single layer on broiler pan. Brush both sides with olive oil. Sprinkle with salt and pepper. Broil until beginning to brown, about 4 minutes per side. Arrange squash slices in single layer on broiler pan. Brush tops of squash with olive oil; season with salt and pepper. Broil until tops begin to brown, about 4 minutes.