Six-ingredient French onion soup
Maintain the rich flavor of this classic soup by stir-frying the onions in dry sherry and adding a dash of Worcestershire sauce.
2 medium, thinly sliced
sherry (dry or sweet)
4 Tbsp, or nonalcoholic wine
fat-free beef broth
grated Parmesan cheese
2 Tbsp, such as Parmigiano-Reggiano