This is one incredible burger! Ground chuck is mixed with chopped, sweet Vidalia onion, perfectly cooked and topped with sauteed mushrooms that are cooked with garlic and Worcestershire, and rich, creamy swiss cheese! I'm sure you've had these in restaurants, but they are so much better made fresh at home! Put it all together with soft, warm buns, sliced tomato, lettuce and sliced onion, mouthwateringly delish!