INGREDIENTS
2 tbsp
unsalted butter
1
large yellow onion (thinly sliced)
salt and black pepper (to taste)
1 1/4 lb
lean ground beef
5 dashes
Worcestershire sauce
3/4 tsp
salt
1/4 tsp
black pepper
2 tbsp
unsalted butter
8
slices Swiss cheese
8
slices rye bread ((or bread of choice))
2 tbsp
unsalted butter