01 -
Cook the ground beef in a hot skillet over medium-high heat, breaking it up with a wooden spoon. Stir continuously for 5 to 7 minutes until fully browned with no pink remaining. Remove beef from the skillet and set aside, leaving juices in the pan.
02 -
While the beef cooks, thinly slice the onion and green bell pepper, and finely mince the garlic to ensure a smooth cooking process.
03 -
Add the butter to the same skillet and melt over medium heat. Add the onion, bell pepper, and garlic. Stir occasionally and cook for 4 to 5 minutes until the vegetables soften and the onion becomes translucent.
04 -
In a small bowl, whisk together ketchup, Worcestershire sauce, salt, black pepper, cornstarch, and beef broth until cornstarch dissolves completely for an even consistency.
05 -
Pour the sauce mixture into the skillet with vegetables and stir to coat evenly. Return the cooked ground beef to the pan and combine thoroughly. Cook for 2 to 3 minutes until the sauce thickens and clings to the beef and vegetables.
06 -
Place the hoagie rolls cut-side up under a broiler for about 60 seconds. Watch carefully to prevent burning and to achieve a lightly toasted surface.
07 -
Place one slice of provolone cheese on the bottom half of each toasted roll. Spoon the beef and vegetable mixture evenly over the cheese, then add an additional slice of cheese on top if desired.
08 -
Return the assembled open sandwiches to the broiler for 1 to 2 minutes until the cheese melts, bubbles, and browns lightly. Serve immediately while hot.