In a small cup mix the beef broth and cornstarch together
Add the ketchup, Worcestershire sauce, salt, black pepper, beef broth/cornstarch mixture into the pan.
Cook until the mixture is only slightly liquidy (about 75% of the mixture is above liquid), 3-5 minutes.
Turn off the heat, add in the provolone cheese.
Served on toasted brioche buns.
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