Preheat oven to 400°F (200°C). Lay out 6 pieces of aluminum foil, approximately 12x18 inches each.
In a large mixing bowl, gently combine 1 1/2 pounds ground beef, 2 tablespoons onion powder, 1 teaspoon black pepper, 1/2 teaspoon salt, 1/2 teaspoon paprika, and 1/2 teaspoon garlic powder. Divide mixture into 6 equal portions and gently shape into a patty. Set aside.
Use a sharp knife or mandoline to thinly slice 4 medium Yukon gold potatoes and 3 medium carrots into 1/8-inch rounds. Slice 1 medium white onion.
Add the vegetables to a mixing bowl and combine with 2 tablespoons olive oil, 2 teaspoons minced garlic, 1/2 teaspoon Italian seasoning, 1 teaspoon salt, and 1/2 teaspoon black pepper. Stir until well coated.
Divide the vegetables evenly between the 6 pieces of foil, placing the vegetables in the center. Top each with one of the prepared patties.
Fold foil over the food and crimp the edges tightly to seal. Be sure to leave a little room inside each packet for heat circulation.
Place foil packets on a baking sheet. Bake for 30 to 35 minutes, or until vegetables are tender and ground beef is cooked through to an internal temperature of 165°F (74°C).
Carefully open packets (watch for steam) and serve hot.
Notes
Grill Instructions: Preheat your grill to medium-high heat (around 400°F). Place the foil packets directly on the grill grates over indirect heat and close the lid. Cook for 30 to 35 minutes, flipping the packets halfway through the cooking time.
Campfire Coals Instructions: Use heavy-duty aluminum foil and double wrap each packet. Allow the campfire to burn down until you have a bed of hot coals. Place the foil packets directly onto the coals, or elevate them slightly on a campfire grate if you have one. Cook for 25 to 30 minutes, turning halfway through with long tongs to ensure even cooking.