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1.Cook the Beef:
Heat olive oil in a large skillet over medium heat.
Add ground beef and cook until browned, breaking it apart with a spoon as it cooks. Drain excess fat if necessary.
2.Sauté Vegetables:
Push the beef to one side of the skillet.
Add diced onion, bell pepper, and mushrooms to the skillet. Sauté until vegetables are softened (about 5 minutes).
3.Flavor the Mixture:
Stir the beef and vegetables together.
Add ketchup, Worcestershire sauce, garlic powder, onion powder, salt, and black pepper. Mix well.
4.Thicken the Sauce:
Pour in beef broth and bring to a simmer.
Stir in the cornstarch slurry and cook for 2-3 minutes, or until the mixture thickens.
5.Add Cheese:
Turn the heat to low. Lay slices of provolone cheese over the beef mixture.
Cover the skillet and let the cheese melt, about 1-2 minutes.
6.Assemble:
Toast hamburger buns if desired.
Spoon the cheesy beef mixture onto the buns.
7.Serve:
Serve hot with your favorite side dishes like fries, chips, or a fresh salad.
8.Tips:
Swap ground beef for ground turkey or chicken for a lighter version.
Use hoagie rolls for a more authentic Philly cheesesteak vibe.
Add hot sauce or jalapeños for a spicy kick.
Enjoy your Philly Cheesesteak Sloppy Joes! 
