Onion Soup Gratinée | Williams Sonoma

Ingredients

• 2 Tbs. unsalted butter
• 4 yellow onions, thinly sliced
• 2 garlic cloves, chopped
• 4 fresh thyme sprigs
• 1 bay leaf
• 2 Tbs. all-purpose flour
• 1/4 cup dry white wine
• 1/4 cup port
• 8 cups chicken stock
• Salt and freshly ground pepper, to taste
• 1-lb. loaf country-style white bread
• 1/2 lb. grated Gruyère cheese