Mozzarella, red pepper, and pesto sandwich

Roasted red peppers and mozzarella are sandwiched between sourdough in this easy six-ingredient vegetarian recipe. It’s a simple sandwich that offers big flavor, ideal for on-the-go lunches. For a rich combination, we mixed pesto with mayonnaise and layered it with crisp, shredded romaine lettuce. You could substitute peppery arugula or mild-flavored spinach. Additionally, you could use sun-dried tomato pesto or replace the pesto mayonnaise altogether with briny, rich olive tapenade; substitute any cheese that you like; or swap out the bread for focaccia or ciabatta. Serve this sandwich with fresh fruit or a simple side salad to complete the meal.