01 -
Place the beef chuck roast in the crockpot. Sprinkle the ranch dressing mix (if using) and au jus gravy mix over the roast.
02 -
Pour the beef broth and Worcestershire sauce over the roast. Add the sliced onion around the beef.
03 -
Cover and cook on low for 7-8 hours or on high for 4-5 hours, until the meat is tender and shreds easily.
04 -
Remove the beef from the crockpot and shred it with two forks.
05 -
Toast the French rolls or hoagie buns. Divide the shredded beef evenly between the rolls, and top each with a slice of provolone cheese.
06 -
Serve the sandwiches with the au jus broth from the crockpot for dipping.