01 -
Sauté mushrooms in butter over medium heat until golden brown and tender. Set aside.
02 -
Mix ground beef with salt, pepper, and Worcestershire sauce. Form patties slightly larger than the bread and cook in a skillet until browned on both sides.
03 -
Spread a thin layer of mayo on the bread. Place Swiss cheese on both sides, then add the beef patty and sautéed mushrooms.
04 -
Heat a skillet and grill the sandwich until the bread is golden brown and crispy, flipping carefully.
05 -
Slice in half and enjoy this gooey, cheesy, crispy delight.