Philly Cheesesteak Skillet

Name: Philly Cheesesteak Skillet
Ingredients: 3 ounces white American cheese (4 to 5 slices, or 1/2 cup shredded); 3 ounces provolone cheese (4 to 5 slices, or 1/2 cup shredded); 2 medium red, yellow, or green bell peppers; 1 large yellow onion; 1 (1 1/2-pound) boneless ribeye steak (1 to 1 1/2 inches thick); 1 teaspoon kosher salt, divided; 1/2 teaspoon freshly ground black pepper, divided; 2 tablespoons olive oil, divided; 4 (6-inch) soft sub, hoagie, or Italian sandwich rolls (optional)