Preheat oven to 350 degrees.  Cut all vegetables into uniform pieces - about medium sized cubes.  In a small bowl combine ground beef, worcestershire sauce, and salt and pepper to taste.  Make 4 pouches out of tilnfoil, and add vegetables.  (Divide evenly between them.)  Dot vegetables with 1 tablespoon of butter for each pouch.  Salt and pepper if desired.  Shape meat into four patties - one for each pouch.  Add a patty to each pouch and seal.  Bake for 30 minutes or until potatoes are fork tender.

These can be made on the grill outside.  Just put on a medium hot grill for thirty minutes instead of placing in the oven.