Ingredients
- 1 garlic clove, halved
- 1 bay leaf, scored
- 2 thyme sprigs
- 6 cups veal stock or beef stock (homemade or store-bought, see note below)
- 4 medium onions, cut into 1/2-inch-thick slices
- 6 tablespoons grapeseed oil
- 1/4 cup unsalted butter
- 1/4 cup dry sherry
- 2 teaspoons Worcestershire sauce
- 20 (1-inch) croutons, to cover soup
- 16 slices Emmental or Gruyère cheese
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