French Onion Soup

Since I found out Gruyere was naturally lactose-free, I've been giddy about the prospect of French Onion Soup (something I hadn't had in several years).  My first effort omitted the bread/crouton, and I realized it was a necessary element to keep the cheese afloat....without it, the cheese sank, and therefore there was nothing to bubble and brown on top.

Here's the final experiment:

Beef broth, red onions, dry red wine, gruyere, reggiano parmigianno, sourdough bread (with real sourdough starter....see post on sourdough bread)

DEEELICIOUS!