In small bowl, stir bread crumbs and milk; let stand until milk is absorbed. In medium bowl, add beef, onion, remaining teaspoon of garlic, the Worcestershire sauce, egg, 1 teaspoon of the salt and the pepper; stir. Add bread crumb mixture; fold ingredients together. Taking care not to compress mixture, form small loaf, and place in center of foil square. Pull corners and sides of foil up, but do not seal. Place foil on top of potatoes in insert.