Making Crockpot French Dip Sandwiches is simple and straightforward. Follow these easy steps for a delicious result:

1. Prepare the Beef: Trim excess fat from the beef chuck roast and season it generously with salt and pepper.
2. Layer the Ingredients: Place the sliced onion at the bottom of the crockpot. Add the minced garlic on top of the onions.
3. Add the Beef: Place the seasoned beef roast on top of the onions and garlic.
4. Mix the Liquid: In a separate bowl, combine beef broth, water, Worcestershire sauce, soy sauce, thyme, and rosemary. Pour this mixture over the beef in the crockpot.
5. Cook the Beef: Cover the crockpot and cook on low for 8 hours or high for 4 hours, until the beef is tender and easily shreds with a fork.
6. Shred the Beef: Once cooked, remove the beef from the crockpot. Use two forks to shred the meat, discarding any large pieces of fat.
7. Return the Beef: Place the shredded beef back into the crockpot, mixing it with the juices for maximum flavor. Let it sit for an additional 10-15 minutes to soak up the broth.
8. Prepare the Rolls: While the beef is resting, preheat your oven to 350°F (175°C). Slice the rolls in half and place them on a baking sheet.
9. Optional Cheese Step: If using cheese, place slices of provolone or Swiss on the bottom half of each roll. Toast in the oven for about 5-7 minutes or until the cheese is melted.
10. Assemble the Sandwiches: Fill each roll with the shredded beef and drizzle some of the cooking juices over the top.
11. Serve with Broth: Ladle some of the remaining broth into small bowls for dipping.

These steps will guide you to create scrumptious Crockpot French Dip Sandwiches that are sure to become a family favorite!