Cheesy Potato Packets

Toss potatoes, scallions, oil, salt, pepper and garlic powder together in a large bowl.

Cut 4 pieces of heavy-duty foil, about 12 by 17 inches each. Coat one piece with cooking spray. Place half the mixture in the middle of the coated foil and enclose like a package. Place seam-side down on a second piece of foil and enclose again so the potatoes are wrapped in a double-thick packet. Repeat with the remaining foil and potato mixture.

Prepare a campfire and let it burn down to the coals. Cook the packets 4 to 6 inches above the coals, turning once or twice, until the potatoes are tender, 20 to 25 minutes. Carefully open the packets; sprinkle with cheese and loosely crimp closed again. Return to the heat and cook until the cheese is melted, about 5 more minutes.