1 pound ground beef

1 egg

¼ cup bread crumbs

⅛ teaspoon ground black pepper

½ teaspoon seasoned salt

½ teaspoon onion powder

½ teaspoon garlic powder

1 teaspoon Worcestershire sauce

1 tablespoon vegetable oil

1 cup thinly sliced onion

2 tablespoons all-purpose flour

1 cup beef broth

1 tablespoon cooking sherry

½ teaspoon seasoned salt