Preparation:

Step 1: Preheat a grill or stovetop pan over medium-high heat. While waiting for the pan to heat up, season the ground beef with salt, pepper, and Worcestershire sauce. Form the seasoned ground beef into 4 equally sized patties.

Step 2: In a skillet, heat the olive oil over medium heat. Once hot, add the sliced mushrooms and minced garlic. Sauté for about 5-7 minutes, stirring occasionally, until the mushrooms are golden brown and tender. Set aside.

Step 3: Grill the prepared patties for about 4-5 minutes on each side or until the desired level of doneness is achieved. In the last minute of cooking, place a slice of Swiss cheese on top of each patty to melt.

Step 4: While the patties are grilling, butter the burger buns with softened butter. Toast them on the grill or in a pan until they’re lightly golden and crispy.

Step 5: Assemble the Swiss Mushroom Burgers by placing each cooked patty with melted Swiss cheese on the bottom half of a toasted bun. Top with the sautéed mushrooms, and if desired, add lettuce and tomato slices. Place the top bun on and serve immediately.