Ingredients:

3 pounds (about 6 large) yellow onions
2 tablespoons olive
oil 2 tablespoons unsalted butter
1/2 teaspoon sugar
2 large garlic cloves, minced
1/2 cup dry
sherry 8 cups beef broth
1 teaspoon salt
1 bay leaf
A few sprigs of fresh
thyme 1 baguette
Olive oil for brushing the baguette
8 ounces Gruyere cheese, grated