01 -
Trim excess fat from the beef roast if necessary and place it in the slow cooker.
02 -
Scatter the sliced onion and minced garlic over and around the roast, then evenly sprinkle the dry onion soup mix.
03 -
Pour the beef broth over the roast so it is mostly submerged but with some meat exposed to intensify flavor concentration.
04 -
Cover and cook on low for 8 to 10 hours or high for 4 to 6 hours, until the beef is fork-tender and easily shredded.
05 -
Transfer the beef to a cutting board and shred using two forks, discarding any large fat pieces.
06 -
Strain the cooking liquid to remove solids and fat. Return some of the clear au jus to the shredded beef to maintain moisture, reserving the remainder for dipping.
07 -
Preheat the broiler. Place shredded beef on the rolls, top with cheese slices, and broil briefly until cheese melts and bread edges toast.
08 -
Serve sandwiches alongside bowls of warm au jus for dipping and enjoy immediately.