Place the minced garlic and sliced onion in the crock pot.
Add the water and bouillon.
Mix all of the rub ingredients in a small bowl and then rub it all over the beef, massaging it into the meat.
There will be some of the rub left over.
Dump it into the broth, and stir to mix.
Place the meat in the broth and cook on low for 6-8 hours.
About one-half hour before serving, make the onions and peppers topping in a frying pan, frying over medium heat in the olive oil until they are tender. Set aside.
Remove the meat from the broth and let cool before slicing.
Slice the meat thin and return it to the hot broth just long enough to heat through.
Serve sliced beef on rolls.
Top with cooked peppers and onions and a little bit of broth.
Also top with pepperoncini peppers, if desired.
Notes
Simple slow cooker recipe you will want to make over and over.