Pork and Melted Cheese Hoagies

Bahan-bahan (4 porsi)

• 24 ounces boneless pork loin or pork tenderloin, (trim fat, and cut into very thin, bite-sized pieces)
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• ½ teaspoon salt
• ½ teaspoon freshly ground black pepper
• 4 French Rolls
• 4 tablespoons butter, (at room temperature)
• 2 tablespoons olive oil, (divided)
• 1 medium sweet onion, (sliced thinly)
• 1 medium red bell pepper, (seeded and sliced thinly)
• 1 medium green bell pepper, (seeded and sliced thinly)
• 8 slices white American cheese
• ¼ cup shredded Parmesan cheese