Creating the Chicken Philly Cheesesteak is simple when you follow these steps:

1. Prepare the Chicken: Slice the boneless chicken breasts into thin strips.
2. Sauté the Vegetables: Heat 1 tablespoon of olive oil in a skillet over medium heat. Add the sliced onion and bell pepper. Sauté for about 5-7 minutes until softened.
3. Cook the Chicken: Push the vegetables to the side of the skillet. Add the remaining tablespoon of olive oil and the sliced chicken. Season with garlic powder, salt, and black pepper. Cook for 7-10 minutes, stirring occasionally, until the chicken is cooked through.
4. Melt the Cheese: Once the chicken is fully cooked, place the cheese slices on top of the chicken and vegetables. Cover the skillet with a lid and let it cook for an additional 2-3 minutes until the cheese is melted.
5. Prepare the Hoagie Rolls: While the cheese is melting, slice the hoagie rolls open. You can toast them lightly if desired.
6. Assemble the Sandwiches: Using a spatula, scoop the chicken and vegetable mixture onto each hoagie roll.
7. Add Optional Toppings: If you like, add any extra toppings such as sliced jalapeños, mushrooms, or a spread of mayonnaise.
8. Serve: Serve the sandwiches warm, enjoying each bite of this delicious creation.

These steps will guide you in creating this incredible Chicken Philly Cheesesteak effortlessly.