Heat your skillet over medium-high heat first.
Add the ground beef to the pan.
Break it apart with your wooden spoon.
Cook until it turns completely brown.
This takes about 5-7 minutes total.
Drain any excess fat from the pan.
Toss in the diced onion and pepper.
Cook them until they become soft.
This takes about 5 minutes of cooking.
Add the minced garlic last.
Stir everything together well.
Pour in the Worcestershire sauce now.
Add the beef broth next.
Season with salt and pepper generously.
Let everything simmer for 10 minutes.
The sauce should thicken nicely.
Place provolone slices on top.
Cover the pan with a lid.
Let the cheese melt completely.
This takes just 2-3 minutes.
Toast your hamburger buns lightly.
Spoon the cheesy beef mixture generously.
Serve them hot and enjoy immediately.