Lay out 4 sheets of 12″ heavy duty foil.
Slice 1 medium onion into several slices.
Place onion slices on the center of foil, making a base for your hamburger patty to go.
Place 1 lb. lean ground beef in a bowl. Add small amount of water to beef so that it will effectively steam the vegetables while cooking.
Shape the ground beef into four hamburger patties.
Place the hamburger patties on top of the onions.
Peel and slice 4 medium potatoes.
Place the sliced potatoes on top of the burger and onion.
Peel and slice 4 medium carrots.
Add salt and pepper, garlic salt, and seasoned salt. Also add butter if desired.
Take the pouches and bring opposite sides of the foil together above the food and fold them over once to make a 1' crease at the top. Fold the foil over 2 more times, but leave several inches of space between the food and the top of the foil pack, like a tent. Fold or roll the ends of the pack together toward the center to make tight seals.
Bake in preheated 350 degree oven for 20 to 30 minutes. Enjoy!