Place sliced onions on the bottom of the slow cooker
Pour the seasoning blend over the chuck roast and place on top of the onions
Add the remaining ingredients to the slow cooker
Cook on high for 5-6 Hours
You’ll know it’s finished when you can stick a fork in the beef and twist and it begins to shred
Shred the roast and place it back in to the slow cooker
Serve on a toast roll with the cheese of your choice
Enjoy!