INGREDIENTS
1
Bay leaf
3
lbs Sweet onions
6
sprigs Thyme, fresh
6 cups
Beef stock
2 tsp
Brown sugar
1
Kosher salt and freshly ground black pepper
2 tsp
Sherry vinegar
1
french baguette
1 cup
Asiago cheese
3 tbsp
Butter, unsalted
1 cup
Gruyere cheese