INGREDIENTS
1 lb
Ground beef, lean
1 clove
Garlic
8 oz
Mushrooms
1 tbsp
Rosemary, fresh
1
Shallot, minced and divided (about 3 tablespoons), small
1 cup
Beef broth
1 tbsp
Worcestershire sauce
1
Salt and pepper
1 tbsp
Olive oil, extra virgin
4
Buns
2 tbsp
Butter
4
slices Swiss cheese