Cook the Ground Beef
In a large skillet over medium-high heat, add a tablespoon of olive oil. Once hot, add the ground beef, breaking it up with a wooden spoon as it cooks. Season with salt and pepper. Cook until the beef is fully browned and no longer pink. Drain excess grease if needed.
Sauté the Veggies
Push the cooked beef to one side of the skillet. Add the onions, green peppers, and red peppers to the empty side. Sauté until the veggies soften, about 5 minutes. Add in the minced garlic and cook for another 30 seconds until fragrant.
Build the Flavor
Stir the beef and veggies together. Add the Worcestershire sauce and ketchup, stirring to combine. In a small bowl, whisk the beef broth and cornstarch together until smooth, then pour it into the skillet. Stir everything and let it simmer for about 5–7 minutes, or until the mixture thickens into a rich, slightly saucy consistency.
Make It Cheesy
Turn off the heat and lay slices of provolone cheese over the beef mixture. Cover the pan for a minute or two until the cheese melts into gooey, dreamy perfection. Stir lightly to mix the cheese into the beef if you like it extra melty throughout.
Toast the Buns (Optional but Recommended!)
For the best texture, lightly butter your sandwich buns and toast them on a skillet or under the broiler until golden brown.
Assemble and Serve
Scoop generous portions of the cheesy beef filling onto your toasted buns. Serve hot and watch them disappear in no time!
Tips for the Best Philly Cheesesteak Sloppy Joes
Choose the Right Beef: Go for ground beef with about 85% lean to ensure juiciness without excessive grease.
Customize the Veggies: If you prefer mushrooms or jalapeños, feel free to add them in!
Cheese Options: Provolone is traditional, but mozzarella, white American, or even a bit of cheddar can work wonderfully.
Make it Spicier: Add a few dashes of hot sauce or a sprinkle of crushed red pepper for a little kick.
Storage: Leftover filling keeps well in the fridge for up to 3 days. Reheat and serve fresh on buns!