>>76306296>Recipe For the Ultimate Soup6 tablespoons (90g) unsalted butter, plus more for bread
3 pounds (1.4kg) yellow or mixed onions, sliced 1/8 inch thick (see note)
Kosher salt and freshly ground black pepper to taste, divided
1/2 cup (120ml) dry sherry (such as Amontillado)
2 quarts (1.8L) homemade beef stock or homemade or store-bought low-sodium chicken stock
2 sprigs thyme
1 bay leaf
1 teaspoon (5ml) Asian fish sauce (optional)
1 teaspoon (5ml) cider vinegar
8 bowl-size slices rustic bread, toasted until crisp
1 medium clove garlic
1 pound (450g) Gruyère cheese, grated
2 tablespoons freshly minced chives, for garnish
