1) Lay out squares of foil and spray with your choice of non stick spray.2) In each section add - thinly sliced potatoes, thinly sliced carrots, and a hamburger patty on top. You can add any other vegetables you like roasted into the packet. Mom used to slice a bunch of different things and let us kids pick what we wanted in our packet. 3) Add seasoning to your preferences, at least salt and pepper.4) Wrap the packet so it is sealed. 5) If using the oven, place the packets on a pizza pan or cookie sheet. They can go directly on the grill or in the coals of a campfire. 6) Cooking time in the oven is around an hour. Cooking time on the grill or in the campfire is variable based on heat but usually less than that. It's done when the potatoes and carrots are at the desired softness and the burger is cooked enough that you're willing to eat it. 7) Watch out for the steam! But open it up once you take it off the fire and add butter, cheese, and sour cream or dressing as desired.