A Portobello burger is a popular vegetarian alternative to traditional meat burgers. It features a large, grilled Portobello mushroom cap as the main ingredient, which is often marinated to enhance its flavor. The mushroom is typically served on a bun with various toppings such as lettuce, tomato, cheese, and sauces. This burger is not only flavorful but also packed with nutrients. Portobello mushrooms are low in calories and rich in vitamins, minerals, and antioxidants. They provide a satisfying texture and umami taste, making the Portobello burger a favorite among both vegetarians and meat-eaters looking for a hearty meal.