01 -
Unsalted butter - 6 tablespoons.
02 -
Yellow or mixed onions, sliced - 3 pounds.
03 -
Dry sherry - 1/2 cup.
04 -
Beef or chicken stock - 2 quarts.
05 -
Fresh thyme sprigs - 2.
06 -
Bay leaf - 1.
07 -
Fish sauce - 1 teaspoon.
08 -
Cider vinegar - 1 teaspoon.
09 -
Rustic bread slices - 8.
10 -
Garlic clove - 1.
11 -
Gruyère cheese, grated - 1 pound.
12 -
Fresh chives, minced - 2 tablespoons.