Creating this Easy Philly Cheese Steak is simple if you follow these steps:

1. Heat the Oil: In a large skillet over medium-high heat, add the olive oil.
2. Cook the Vegetables: Add the sliced onion (and bell pepper, if using) to the skillet. Sauté until they are soft and slightly caramelized, about 5-7 minutes.
3. Add the Steak: Increase the heat to high, and add the thinly sliced steak to the skillet. Season with salt and pepper to taste. Cook for about 3-5 minutes until the steak is browned and cooked through.
4. Melt the Cheese: Lower the heat to medium, and place the cheese slices over the steak and veggies. Cover the skillet for 1-2 minutes to allow the cheese to melt completely.
5. Prepare the Rolls: While the cheese is melting, slice your hoagie rolls in half lengthwise, but do not cut all the way through.
6. Assemble the Sandwich: Use a spatula to transfer the cheesy steak mixture into the rolls, ensuring each one is filled generously.
7. Serve and Enjoy: Serve immediately while the sandwiches are hot, accompanied by your favorite condiments if desired.

With these easy steps, you’re on your way to enjoying delicious Easy Philly Cheese Steak sandwiches.