Recipe: French Onion Soup

-3 Tablespoons butter

-6 large yellow onions thinly sliced

-2 cups red wine

-8 cups beef broth

-1 sprig fresh thyme

-Kosher salt and freshly ground black pepper

-1 loaf rustic bread, cut into thick slices

-3 tablespoons olive oil

-1garlic

-8 ounces gruyere, finely shredded