Add floor beef, garlic powder, salt, and pepper, to a big skillet and prepare dinner till browned. Take away beef to a plate and put aside.
Add butter, onions, and peppers to the skillet and brown till softened, 4-5 minutes.
Return beef to skillet and stir in ketchup and Worcestershire sauce. Combine cornstarch right into a 2 tablespoons of the meat broth and add to pan. Stir in remainder of beef broth.
Let simmer till most liquid has absorbed and modify seasoning as wanted.
Take away from warmth, add provolone cheese and serve on toasted hamburger buns.
