Step 1: Prepare the Ingredients
• Season the Beef: Season the beef chuck roast generously with salt and pepper on all sides.
• Layer the Crockpot: Place the sliced onion and minced garlic at the bottom of the crockpot.

Step 2: Add the Beef and Broth
• Add Beef: Place the seasoned beef roast on top of the onions and garlic.
• Mix Broth: In a separate bowl, combine the beef broth, water, Worcestershire sauce, soy sauce, dried thyme, and dried rosemary. Pour this mixture over the beef in the crockpot.

Step 3: Cook the Beef
• Cover and Cook: Cover the crockpot and cook on low for 8 hours or on high for about 4 hours, until the beef is tender and easily shreds with a fork.

Step 4: Shred the Beef
• Shred Meat: Once cooked, remove the beef from the crockpot and shred it using two forks. Return the shredded beef to the crockpot and stir to combine with the juices.

Step 5: Prepare the Sandwiches
• Toast Rolls: If desired, preheat your oven to 350°F (175°C) and toast the hoagie rolls for a few minutes until lightly crispy.
• Assemble Sandwiches: Fill each roll with the shredded beef mixture. If using, top with sliced provolone or Swiss cheese and place back in the oven for a few minutes until the cheese is melted.

Step 6: Serve
• Serve with Au Jus: Ladle some of the cooking liquid from the crockpot into small bowls for dipping.
• Garnish: Optionally garnish with chopped fresh parsley before serving.
• Enjoy: Serve the sandwiches warm with the au jus on the side for dipping.