01 - Preheat the oven to 400°F for toasting the rolls and melting the cheese.
02 - Heat 1 tbsp olive oil in a large skillet over medium heat. Add the sliced onion and bell peppers. Sauté for 8-10 minutes, stirring occasionally, until softened and lightly caramelized. Remove vegetables from the skillet and set aside.
03 - Add another 1 tbsp olive oil to the same skillet. Add the sliced chicken, salt, pepper, garlic powder, and paprika. Cook for 6-8 minutes, stirring occasionally, until the chicken is cooked through and lightly browned.
04 - Return the sautéed vegetables to the skillet with the chicken. Stir to combine everything and heat through for 2 minutes.
05 - Slice the hoagie rolls lengthwise, leaving one edge intact like a hinge. Lightly butter the insides of each roll. Place the rolls on a baking sheet, cut side up, and toast in the oven for 3-4 minutes until just golden.
06 - Divide the chicken and vegetable mixture evenly among the toasted rolls. Top each sandwich with 2 slices of provolone cheese.
07 - Return the assembled sandwiches to the oven for 3-4 minutes, or until the cheese is melted and bubbly.
08 - Serve the chicken cheese steak sandwiches immediately while hot and the cheese is melted.