01 - Rinse the corned beef brisket under cold water and pat dry with paper towels. Place the brisket fat-side up in the bottom of a 6-quart or larger slow cooker.
02 - Sprinkle the included spice packet or pickling spice evenly over the top of the corned beef brisket.
03 - Arrange the quartered potatoes, carrot pieces, onion wedges, and smashed garlic cloves around and on top of the beef, distributing them evenly.
04 - Pour in the beef broth and water, ensuring the beef is just covered by the liquid. Add the bay leaves and grind black pepper over the top to taste.
05 - Cover the slow cooker with its lid. Cook on low heat for 6 hours until the beef begins to tenderize.
06 - Arrange the cabbage wedges on top of the cooking mixture during the last 2 hours of cooking. Replace the lid and continue cooking until the beef and vegetables are fork-tender.
07 - Carefully remove the brisket from the slow cooker and transfer it to a cutting board. Let it rest for 10 minutes before slicing to retain juices.
08 - Slice the brisket against the grain into thin slices. Serve the sliced beef alongside the tender vegetables. Ladle some of the cooking liquid over each serving for added moisture and flavor.