Modern Steak Sandwich | MealGenie Recipes | MealGenie

Ingredients

• 1 pound flank steak
• 1 tablespoon olive oil
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1 onion, thinly sliced
• 1 bell pepper, thinly sliced
• 4 slices whole-grain bread
• 4 slices provolone cheese
• 2 tablespoons chipotle mayonnaise
• 1 tablespoon Dijon mustard