Don’t feel like babysitting your vegetables on the grill? Try cooking them in packets instead. This method works great for dense vegetables like potatoes, sweet potatoes or other roots. Simply place a 24-inch-long piece of foil on the counter and lightly coat with nonstick cooking spray. Arrange thinly sliced vegetables a single layer, slightly overlapping, on the foil. Leave a 2-inch border on all sides. Fold foil over and pinch the edges together, making a packet. Place the packet on the grill. Cover the grill and cook until the vegetables are tender (about 12 to 15 minutes, for potatoes). When you open a packet to check doneness, be careful of steam.