Creating Slow Cooker Beef Manhattan is simple and straightforward. Just follow these easy steps:

1. Prepare the Beef: Cut the beef chuck roast into bite-sized chunks and season with salt and pepper.
2. Layer Ingredients: Place the sliced onions at the bottom of the slow cooker. Add the beef chunks on top.
3. Combine Sauce Ingredients: In a separate bowl, whisk together beef broth, soy sauce, Worcestershire sauce, brown sugar, minced garlic, and dried thyme. Pour this mixture over the beef.
4. Set the Slow Cooker: Cover the slow cooker with its lid, and set it to low heat for 6-8 hours or high heat for 4-5 hours, depending on your schedule.
5. Check for Doneness: The beef should be tender and easily shred with a fork when it’s done.
6. Taste and Adjust: Before serving, taste the sauce and adjust seasonings if necessary.
7. Prepare Sandwiches: Once done, use a slotted spoon to scoop the beef onto slices of bread, allowing some of the delicious gravy to soak into each piece.
8. Garnish: Optionally, sprinkle chopped parsley on top for added color and flavor.

Following these steps will lead to the creation of your delicious Slow Cooker Beef Manhattan, perfectly set for serving!