French Onion Soup | Umami

Ingredients

• 1/2 cup unsalted butter
• 4 onions, sliced
• 2 garlic cloves, chopped
• 2 bay leaves
• 2 fresh thyme sprigs
• Kosher salt and freshly ground black pepper
• 1 cup red wine, about 1/2 bottle
• 3 heaping tablespoons all-purpose flour
• 2 quarts beef broth
• 1 baguette, sliced
• 1/2 pound grated Gruyere