French Onion Soup Recipe - Grit

Ingredients

• 4 tablespoons (2 ounces/55g) unsalted butter
• 2-1/2 pounds (1.2kg) yellow or white onions, peeled and very thinly sliced
• 1 teaspoon granulated sugar
• 2 cloves garlic, peeled and minced
• 2 teaspoons sea salt or kosher salt, plus more if needed
• 1 teaspoon freshly ground black pepper, plus more if needed
• 2 teaspoons all-purpose flour
• 3/4 cup (180ml) white wine or sherry
• 2 quarts (2l) chicken stock
• 1 to 2 teaspoons sherry vinegar or balsamic vinegar, plus more if needed
• 6 thick slices hearty white bread, or about 18 thick-sliced pieces of baguette, well toasted
• 1 to 2 cloves garlic, peeled and left whole, for rubbing the bread
• 3 cups (255g) grated Emmenthal, Comté, or Gruyère cheese