Instructions

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  • Olive oil Notes: 2 Tbsp, plus more to brush toasts
  • unsalted butter Notes: 2 Tbsp
  • yellow onions Notes: 3 lbs, about 6 large onions, halved, peeled and thinly sliced with the grain
  • granulated sugar Notes: 1/2 tsp
  • garlic cloves Notes: 2, minced
  • dry sherry wine Notes: 1/2 cup, or use dry vermouth or dry white wine
  • beef stock Notes: 8 cups, or broth
  • bay leaf Notes: 1
  • sprigs fresh thyme) Notes: 3, plus more to garnish (or 1/4 tsp dried thyme
  • salt Notes: 1 1/2 tsp, or to taste, divided
    Optional
  • black pepper Notes: 1/2 tsp, or to taste
    Optional
  • baguette Notes: 12 slices
  • gruyere cheese Notes: 8 oz, 1 1/2 cups shredded, divided