Ingredients
- 4 T. unsalted butter
- 2 lbs. (about 4 large) onions, peeled and thinly sliced
- 1 clove garlic, minced
- ½ c. dry sherry
- 6 c. chicken stock
- 1 bay leaf
- 2 tsp. thyme leaves
- 1½ tsp. kosher salt
- to taste black pepper
- to taste sugar
- to taste lemon juice
- 6 toasted croutons
Gruyère soufflé batter:
- 4 egg whites, room temperature
- 6 T. Gruyère cheese, grated