In a large skillet over medium heat, cook the ground beef until the meat is browned and crumbly. Drain off any excess grease.
Stir in pizza sauce, ketchup, mustard, Italian seasoning, garlic powder, salt, pepper and Worcestershire sauce. Simmer for 5 minutes until the mixture thickens a bit.
Arrange the split buns on a baking sheet, cut sides up. Spoon a generous amount of the beef mixture onto each bottom half. Sprinkle with shredded cheese and add any optional toppings you like.
Broil on the middle rack for 2–3 minutes, just until the cheese is bubbly and starting to brown. Watch closely as they toast fast.
