Begin by seasoning your beef chuck roast generously with salt and pepper on all sides. Chop your onion into slices. Place the roast into the crockpot and scatter the sliced onions and minced garlic evenly over the top.
In a mixing bowl, combine soy sauce, beef broth, water, Worcestershire sauce, and thyme. Pour this flavorful mixture over the beef and onions in the crockpot.
Cover and cook the beef on low for 7–8 hours or until the beef shreds easily with a fork.
Once the beef is done, remove it from the crockpot and shred it using two forks. Don't forget to reserve the juices to use as a dipping sauce. Slice your hoagie rolls lengthwise and load them with shredded beef and provolone cheese.
Toast your sandwiches in an oven at 350°F (175°C) until the cheese has melted and the bread is slightly crisp. Serve with a small bowl of the reserved jus for dipping.
Notes
If you happen to have leftovers, simply store the beef and jus separately in airtight containers. They’ll last up to 3 days in the refrigerator.