Place the corned beef brisket in the slow cooker and add the spice packet as included.
Add potatoes, carrots, onion and minced garlic around and on top of the beef. Pour in water or broth.
Cover and cook on low for 8 to 9 hours, or on high for 4 to 5 hours, until the beef is tender.
Remove beef, slice against the grain, return to the pot to heat through with the vegetables for a few minutes.
Serve hot, spooning vegetables and juices over slices of corned beef.
Notes
Slow cooker method yields tender corned beef with flavorful vegetables. Slice the beef against the grain for the best texture and serve with a side of cabbage if desired.