Crockpot French Onion Soup Recipe

butter

large yellow onions, sliced and separated into rings

shallots, sliced

large cloves garlic, minced

sherry (or a dry red wine)

reduced-sodium beef broth

Worcestershire sauce

fresh thyme

salt

freshly cracked black pepper

bay leaf

slices of French bread

thick slices Gruyere cheese (or Swiss)