INGREDIENTS
1/4 cup
extra-virgin olive oil
4 lb
large yellow onions, thinly sliced
1 tbsp
chopped fresh thyme, plus more for garnish
1/2 tsp
kosher salt
1/2 tsp
black pepper
1/2 cup
dry vermouth
4 cups
unsalted beef stock
4 cups
unsalted chicken stock
1 tbsp
Marmite
8
slices whole-grain baguette, lightly toasted
4 oz
raclette cheese, grated (about 1 cup)