Preheat your grill to medium-high heat or your oven to 400°F. Gather foil sheets and ingredients for smooth assembly.

In a mixing bowl, combine ground beef with salt, pepper, and garlic powder. Form into four patties larger than the buns.

Cut four pieces of aluminum foil, about 12 inches by 12 inches. Layer half a cup of sliced potatoes, followed by onion and bell pepper. Place a burger patty on each.

Drizzle one tablespoon of olive oil over each packet, season with extra salt and pepper if desired.

Seal the foil packets tightly to preserve moisture and flavors.

Cook the packets on a grill or in the oven for 25-30 minutes, until burgers are cooked through and veggies are tender.

Remove from heat, carefully open packets, and sprinkle cheddar cheese over each patty. Serve immediately.