Chop onion into smallish pieces and put in a nonstick skillit with butter on medium high, season with a pinch of salt, and cook untill brown. Set aside.

Mix beef, soup mix, onion powder, egg, salt and pepper in a bowl until combined.

Form into 3 1/3 lb pattys and cook on medium high untill cooked through.

Put a slice of cheese on top of each and place on an onion bun.

Top with grilled onions and your favorite condiments. A sweet vidalia onion sauce is great if you want more onion.