If you're a fan of earthy flavors, the mushroom Swiss burger is a must-try. Start by sautéing sliced mushrooms with garlic and butter until they are golden brown and tender. Season your ground beef with salt, pepper, and Worcestershire sauce. Grill the patties to your desired level of doneness. Just before they are done, top each patty with a slice of Swiss cheese and let it melt. To assemble the burger, place the patty on a toasted bun, add a generous amount of sautéed mushrooms, and finish it off with a dollop of Dijon mustard. The combination of juicy beef, earthy mushrooms, and creamy Swiss cheese is a match made in burger heaven.