Philly cheese steaks at home

Ingredients

• 2 pounds skirt steak trimmed and sliced with grain into 3 inch wide strips
• 4 sub rolls 8 inch
• 2 tablespoons vegetable oil
• 1/2 teaspoon salt
• 1/8 teaspoon pepper
• 1/4 cup grated Parmesan cheese
• 8 slices white American cheese 8 ounces