1. Preheat your grill or stovetop pan over medium-high heat.
2. Divide the ground beef into four equal portions and shape them into burger patties. Season both sides of the patties with salt and pepper.
3. In a separate pan, heat the vegetable oil over medium heat. Add the sliced onions and bell peppers to the pan and cook until they are soft and lightly caramelized, about 8-10 minutes. Remove from heat and set aside.
4. Place the burger patties on the grill or stovetop pan, and cook for about 4-5 minutes per side, or until they reach your desired level of doneness.
5. During the last minute of cooking, place a slice of provolone cheese on top of each patty to let it melt.
6. While the patties are cooking, lightly toast the hamburger buns on the grill or in a separate toaster.
7. Assemble the burgers by placing a patty with melted cheese on the bottom half of each bun. Top the patty with a generous portion of the sautéed onions and bell peppers. You can also add additional toppings like mayo, ketchup, or mustard if desired.

8. Place the top half of the bun on the toppings, and your Philly cheese steak burgers are ready to be served.
9. Serve the burgers immediately while they are still warm and enjoy!

These Philly cheese steak burgers are a great way to enjoy the flavors of a classic Philly cheese steak sandwich in a convenient burger form. Feel free to customize the toppings and condiments to your liking. Enjoy your meal!