1️⃣ Brown the Beef

• Heat a large cast iron skillet over medium-high heat.
• Add ground beef and cook without stirring until a deep brown crust forms on the bottom.
• Break apart the beef and continue cooking until about 50% is browned for maximum flavor.
• Remove the beef and set aside, leaving the fat in the skillet.

2️⃣ Cook the Vegetables

• Add butter to the same skillet.
• Toss in onions, bell peppers, and mushrooms.
• Let them brown without stirring for 1-2 minutes to develop caramelization.
• Stir and cook for another 1-2 minutes until soft and golden.

3️⃣ Combine Everything

• Return the beef to the skillet.
• In a cup, whisk together beef broth & cornstarch until smooth.
• Pour into the skillet along with ketchup, Worcestershire sauce, salt, and pepper.
• Stir well and let it cook for 3-5 minutes until thickened.

4️⃣ Add the Cheese

• Turn off the heat and stir in chopped Provolone cheese.
• Mix until perfectly melted and gooey. 🤤

5️⃣ Assemble & Serve

• Pile the cheesy beef mixture onto toasted brioche buns.
• Serve warm and enjoy every bite! 😍🍔