Crumble the ground beef into a skillet and add the chopped onion and pepper. When the beef is about half cooked, add the broth and steak sauce. Cook until all items are done and allow to simmer and cook down/thicken.
Slice open hoagie buns and fill 6 with the meat mixture. Then top each with a slice of provolone cheese. Placed under the broiler for around 3 minutes.