Swiss Mushroom Meltdown**

*Ingredients:*
– 1 tablespoon Worcestershire sauce
– 1 pound ground beef (80/20 mix)
– 4 slices Swiss cheese
– 1 tablespoon butter
– 4 slices sourdough or rye bread
– 1 cup mushrooms (sliced)
– 1 tablespoon oil for grilling
– 2 tablespoons mayonnaise or aioli
– 1 teaspoon salt and black pepper
*Instructions:*
1. *Prepare the mushrooms* – Sauté the mushrooms in butter over medium heat until golden brown and tender. Set aside.
2. *Cook the beef patty* – Mix the ground beef with salt, pepper, and Worcestershire sauce. Form patties slightly larger than the bun and cook in a skillet until browned on both sides.
3. *Assemble the sandwich* – Spread a thin layer of mayonnaise on the bun. Place the Swiss cheese on both sides, then add the beef patty and sautéed mushrooms.
4. *Grill to perfection* – Heat a skillet and grill the sandwich until the bun is golden brown and crispy, turning carefully.
5. *Serve warm* – Slice in half and enjoy this gooey, cheesy, and crispy delight.