For a vegetarian twist on a classic burger, try making a teriyaki glazed Portobello mushroom burger. Marinate the Portobello mushrooms in a mixture of soy sauce, ginger, garlic, and honey, then grill them until tender and juicy. Brush them with teriyaki sauce for a sweet and savory glaze. Serve the mushrooms on a toasted bun with lettuce, tomato, and your favorite burger toppings. This innovative burger is not only delicious but also a great option for vegetarians and mushroom lovers.