Preheat Oven or Grill:
Preheat oven to 400°F (200°C) or heat grill to medium-high.
Prepare the Foil Packets:
Tear off 4 large sheets of heavy-duty foil (about 12–14 inches long). Lightly grease or spray each with nonstick spray.
Assemble the Packets:
Divide potatoes, carrots, onion, and bell pepper evenly among the foil sheets. Drizzle with olive oil and season with salt, pepper, garlic powder, onion powder, and Italian seasoning. Top each with a quarter of the ground beef (formed into a loose patty or crumbled). Optional: Sprinkle cheese on top or save it for after cooking.
Seal the Packets:
Fold the foil over the ingredients and seal tightly to form a packet. Place packets on a baking sheet (if baking) or directly on the grill.
Cook:
Oven: Bake for 35–40 minutes, or until meat is cooked through and veggies are tender.
Grill: Cook for 30–35 minutes, turning once halfway through.
Serve:
Carefully open the packets (watch for steam!) and serve directly in the foil or transfer to plates. Add cheese on top if not added earlier and let it melt.