Instructions:

Brown ground beef in a skillet, seasoning with salt and pepper. Set aside.

Sauté onions until deeply golden and fragrant.

Layer each sandwich: one slice Swiss, beef, onions, one slice American, between two slices of buttered Texas toast (butter on the outside).

Cook each sandwich on a griddle or pan until crispy on both sides and cheese is gooey.

Slice in half and serve hot. A melt-in-your-mouth classic!