With all the flavors of the classic Philly Cheesesteak Sandwich stuffed into a jumbo shell, you won't miss the hoagie in these Sloppy Philly Stuffed Shells.
Preheat oven to 350°F.
In a cast-iron skillet over medium-high heat, cook the beef until no longer pink, breaking up large crumbles with the back of a wooden spoon. Use a slotted spoon to transfer the beef to a paper towel-lined plate.
Stir in the ketchup, Worcestershire sauce, salt, and pepper. Let cook while preparing the slurry. Prepare the slurry by stirring the cornstarch with the broth in a small bowl until smooth. Pour into the skillet and mix to combine. Allow the mixture to boil until most of the liquid evaporates.
Stuff mixture into the cooked shells and place in a greased 9x13-inch baking pan.
Top with shredded provolone cheese.
Bake 15-20 minutes, or until bubbly.
Top with scallions (optional).