Philly Cheesesteak Cheeseburger

Instructions:

Burger Patties:

1. Preheat your grill or stovetop griddle over medium-high heat.
2. Divide the ground beef into four equal portions and shape them into burger patties.
3. Season each patty with salt and black pepper on both sides.
4. Grill the burger patties to your preferred level of doneness, usually about 4-5 minutes per side for medium.

Philly Cheesesteak Topping:

1. In a large skillet, heat olive oil over medium heat.
2. Add sliced onions, bell peppers, and mushrooms to the skillet.
3. Sauté the vegetables until they are softened and slightly caramelized, about 5-7 minutes.
4. Season the vegetables with salt and black pepper.
5. Push the vegetables to the side of the skillet and place the slices of cheese on top of the veggies to melt.

Assembly:

1. Place each grilled burger patty on the bottom half of a toasted bun.
2. Spoon the melted cheese and sautéed vegetables over the top of each burger patty.
3. Optionally, spread mayonnaise and ketchup on the top half of the toasted buns.
4. Add lettuce and tomato slices on top of the cheese and vegetables.
5. Place the top half of the bun over the veggies to complete the burger.

Serve the Philly Cheesesteak Cheeseburgers immediately. These burgers are a tasty fusion of two classic American favorites. Feel free to customize the toppings based on your preferences, and enjoy!