Step 1

Add ground beef, garlic powder, salt, and pepper, to a large skillet and cook until browned. Remove beef to a plate and set aside.

Step 2

Add butter, onions, and peppers to the skillet and brown until softened, 4-5 minutes.

Step 3

Return beef to skillet and stir in ketchup and Worcestershire sauce. Mix cornstarch into a 2 tablespoons of the beef broth and add to pan. Stir in rest of beef broth.

Step 4

Let simmer until most liquid has absorbed and adjust seasoning as needed.

Step 5

Remove from heat, add provolone cheese and serve on toasted hamburger buns.