Grilled Portobello Mushroom Burgers Recipe is a healthy, flavorful alternative to classic beef burgers. These burgers are juicy, meaty and easy to cook. Perfect for vegetarian dinners or summer cookouts. The mushrooms soak up marinades and stay tender when grilled. Many people love this recipe because it is simple but tastes gourmet. This Grilled Portobello Mushroom Burgers Recipe uses fresh ...