01 - Arrange the sliced onions and minced garlic evenly across the bottom of the slow cooker insert, creating a bed for the beef.
02 - Rub the chuck roast thoroughly with salt, pepper, thyme, and rosemary on all sides, then place it directly on top of the onion mixture.
03 - Pour the beef broth, soy sauce, and Worcestershire sauce evenly over the roast and onions, ensuring the meat is partially submerged.
04 - Cover with the lid and cook on low heat for 8 hours until the beef is fork-tender and easily shreds apart.
05 - Transfer the cooked roast to a cutting board, shred using two forks, then return the meat to the slow cooker and stir thoroughly to coat with the accumulated juices.
06 - Set your oven to broil. Split the hoagie rolls open, pile generously with shredded beef, and top each sandwich with a slice of cheese.
07 - Arrange the assembled sandwiches on a baking sheet and broil for 2 to 3 minutes until the cheese is bubbly and beginning to brown.
08 - Ladle the remaining cooking liquid from the slow cooker into small serving bowls and serve alongside the sandwiches for dipping.