Ingredients

• 1 large sweet onion (such as Vidalia, Maui, or Walla Walla), cut into 1/2-inch-thick slices and separated into rings (1 cup)
  
• 1 2 - 2 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 1/4 cups lower-sodium beef broth
  
• 1/2 cup water
  
• 1 tablespoon Worcestershire sauce
  
• 1 medium red or green sweet pepper, sliced
  
• 1 16 - ounce loaf whole grain baguette-style bread, cut crosswise into 6 pieces and halved lengthwise, or 6 whole grain hoagie buns, split, and, if desired, toasted