Winter's Best Soup | Recipes Direct

Ingredients

• 3 tablespoons olive oil
• 4 pounds yellow onions, thinly sliced
• 1 1/2 teaspoons kosher salt
• 4 tablespoons water, optional
• 1 1/2 teaspoons all-purpose flour
• 1/4 cup cognac or dry white wine
• 2 (32-ounce) containers low-sodium beef broth
• 2 bay leaves
• 6 large sprigs thyme, plus more leaves, to taste
• 1 tablespoon sherry vinegar
• 8 thin slices country bread
• 3 ounces Gruyère cheese, finely grated