2 tablespoons olive oil, plus more for brushing toast
2 tablespoons unsalted butter
3 pounds yellow onions, about 6 large onions, halved, peeled and thinly sliced with seeds
1/2 teaspoon granulated sugar
2 garlic cloves, minced
1/2 cup dry sherry, or use dry vermouth or dry white wine
8 cups beef stock or broth
1 bay leaf
3 sprigs fresh thyme, plus more for garnish (or 1/4 teaspoon dried thyme). )
1 1/2 teaspoons salt, or to taste, divided
1/2 teaspoon black pepper, or to taste
12 slices baguette
8 ounces Gruyère cheese, 1 1/2 cups grated, divided
How to make French Onion Soup:
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