01 -
Heat a large skillet over medium-high heat. Add ground beef and cook, breaking it apart, until browned and cooked through, about 5 to 7 minutes. Drain excess grease if needed, reserving a small amount for flavor.
02 -
While beef cooks, slice onion and bell pepper into thin strips. Mince the garlic. Set aside.
03 -
Transfer cooked beef to a plate. In the same skillet, melt butter over medium heat. Add sliced onion, bell pepper, and garlic. Sauté for 4 to 5 minutes until softened and translucent.
04 -
In a bowl, whisk together ketchup, Worcestershire sauce, salt, pepper, cornstarch, and beef broth until smooth.
05 -
Pour sauce into skillet with vegetables. Return cooked beef to pan and stir. Simmer for 2 to 3 minutes until thickened.
06 -
Place hoagie rolls cut-side up under a broiler for about 1 minute to toast. Watch closely to prevent burning.
07 -
Place a slice of provolone on each bottom roll. Spoon beef mixture over and top with another cheese slice if desired.
08 -
Place assembled open sandwiches under broiler for 1 to 2 minutes until cheese is melted and bubbling. Serve immediately.