1
large sweet onion (such as Vidalia, Maui, or Walla Walla), cut into 1/2-inch-thick slices and separated into rings
1
2 pound fresh beef brisket or boneless beef bottom round roast
2
cloves garlic, minced
1
teaspoon dried thyme, marjoram, or oregano, crushed
1/2
teaspoon black pepper
1
14 1/2 ounce can lower-sodium beef broth
2
tablespoons Worcestershire sauce
1
16 ounce loaf whole grain baguette-style bread, cut crosswise into 6 pieces and split in half horizontally